diff --git a/include/Diagnostic.hpp b/include/Diagnostic.hpp
index 85722a1122f138fa1e5274448b430c106abda7ea..7c6e1aeec4a8f3f82972bc95ff5fc9277605eebd 100644
--- a/include/Diagnostic.hpp
+++ b/include/Diagnostic.hpp
@@ -6,26 +6,26 @@
 #define DIAGNOSTIC_HPP
 
 class Diagnostic : public QObject {
-	Q_OBJECT
+    Q_OBJECT
 private:
-	typedef QString (Diagnostic::*function_t)();
-	QVector<function_t> func_vec;
-	QString separator;
-	QString tab;
+    typedef QString (Diagnostic::*function_t)();
+    QVector<function_t> func_vec;
+    QString separator;
+    QString tab;
 public slots:
-	void onStarted();
+    void onStarted();
 signals:
-	void Ready();
-	void Update(int, const QString);
-	void Quit();
+    void Ready();
+    void Update(int, const QString);
+    void Quit();
 public:
-	Diagnostic();
-	QString getRoutingInfo();
-	QString getInterfaceInfo();
-	QString getDGPingOutput();
-	QString getODPingOutput();
-	QString getOsInfo();
-	QString getDNSLookup();
+    Diagnostic();
+    QString getRoutingInfo();
+    QString getInterfaceInfo();
+    QString getDGPingOutput();
+    QString getODPingOutput();
+    QString getOsInfo();
+    QString getDNSLookup();
 };
 
 #endif
diff --git a/include/Globals.hpp b/include/Globals.hpp
index 966fec80322e5921915d1c379eeaea24e0c37e8e..cb2c4cc443fbd46f221d61c0210b88138b27d49e 100644
--- a/include/Globals.hpp
+++ b/include/Globals.hpp
@@ -10,13 +10,13 @@
 enum OS_TYPE {OS_WINDOWS, OS_LINUX, OS_OSX, OS_UNKNOWN};
 
 #if defined(Q_OS_WIN)
-	constexpr enum OS_TYPE CURRENT_OS = OS_WINDOWS;
+    constexpr enum OS_TYPE CURRENT_OS = OS_WINDOWS;
 #elif defined(Q_OS_LINUX)
-	constexpr enum OS_TYPE CURRENT_OS = OS_LINUX;
+    constexpr enum OS_TYPE CURRENT_OS = OS_LINUX;
 #elif defined(Q_OS_OSX)
-	constexpr enum OS_TYPE CURRENT_OS = OS_OSX;
+    constexpr enum OS_TYPE CURRENT_OS = OS_OSX;
 #else
-	constexpr enum OS_TYPE CURRENT_OS = OS_UNKNOWN;
+    constexpr enum OS_TYPE CURRENT_OS = OS_UNKNOWN;
 #endif
 
 //
diff --git a/include/NetCheckerWindow.hpp b/include/NetCheckerWindow.hpp
index 36b2373e286c7194c1aa36841b72f25405941629..6f07fd858a6acf90ff1c536b0847ca428588c0ba 100644
--- a/include/NetCheckerWindow.hpp
+++ b/include/NetCheckerWindow.hpp
@@ -21,56 +21,56 @@ QT_END_NAMESPACE
 
 class NetCheckerWindow : public QDialog
 {
-	Q_OBJECT
+    Q_OBJECT
 private:
-	/* widget structure --> */
-	QStackedWidget *global_w; QVBoxLayout *global_l;
-		QWidget *welcome_page_w; QHBoxLayout *welcome_page_l;
-			QWidget *logo_side_w; QVBoxLayout *logo_side_l;
-				QLabel *logo_image_w;
-			QWidget *readme_side_w; QVBoxLayout *readme_side_l;
-				QTextEdit *text_w;
-				QPushButton *next_button_w;
-		QWidget *diagnostic_page_w; QVBoxLayout *diagnostic_page_l;
-			QGroupBox *progressbar_holder_w; QVBoxLayout *progressbar_holder_l;
-				QProgressBar *progressbar_w;
-				QLabel *progress_info;
-				QLabel *progress_info_time;
-			QGroupBox *log_holder_w; QVBoxLayout *log_holder_l;
-				QTextEdit *log_w;
-			QWidget *button_holder_w; QHBoxLayout *button_holder_l;
-				QPushButton* clipboard_button_w;
-				QPushButton* save_button_w;
-	/* <-- widget structure */
-	QTimer *progress_timer;
-	int lang;
-	Diagnostic *diag_obj;
+    /* widget structure --> */
+    QStackedWidget *global_w; QVBoxLayout *global_l;
+        QWidget *welcome_page_w; QHBoxLayout *welcome_page_l;
+            QWidget *logo_side_w; QVBoxLayout *logo_side_l;
+                QLabel *logo_image_w;
+            QWidget *readme_side_w; QVBoxLayout *readme_side_l;
+                QTextEdit *text_w;
+                QPushButton *next_button_w;
+        QWidget *diagnostic_page_w; QVBoxLayout *diagnostic_page_l;
+            QGroupBox *progressbar_holder_w; QVBoxLayout *progressbar_holder_l;
+                QProgressBar *progressbar_w;
+                QLabel *progress_info;
+                QLabel *progress_info_time;
+            QGroupBox *log_holder_w; QVBoxLayout *log_holder_l;
+                QTextEdit *log_w;
+            QWidget *button_holder_w; QHBoxLayout *button_holder_l;
+                QPushButton* clipboard_button_w;
+                QPushButton* save_button_w;
+    /* <-- widget structure */
+    QTimer *progress_timer;
+    int lang;
+    Diagnostic *diag_obj;
     QThread *diag_thread;
 public:
     NetCheckerWindow();
 public slots:
     void show();
-	void nextPage();
-	void copyClipboard();
-	void saveToFile();
-	void changeToHun();
-	void changeToEng();
-	void incrementTime();
-	void finishAction();
-	void updateInfos(int, const QString);
+    void nextPage();
+    void copyClipboard();
+    void saveToFile();
+    void changeToHun();
+    void changeToEng();
+    void incrementTime();
+    void finishAction();
+    void updateInfos(int, const QString);
 private:
-	void initStackedWindow();
-	void initWelcomePage();
-	void initLogoSide();
-	void initReadmeSide();
-	void initDiagnosticPage();
-	void initText();
-	enum {
-		WINDOW_WIDTH = 380,
-		WINDOW_HEIGHT = 420,
-		LOGO_WIDTH = 120,
-		README_WIDTH = (WINDOW_WIDTH-LOGO_WIDTH)
-	};
+    void initStackedWindow();
+    void initWelcomePage();
+    void initLogoSide();
+    void initReadmeSide();
+    void initDiagnosticPage();
+    void initText();
+    enum {
+        WINDOW_WIDTH = 650,
+        WINDOW_HEIGHT = 420,
+        LOGO_WIDTH = 120,
+        README_WIDTH = (WINDOW_WIDTH-LOGO_WIDTH)
+    };
 };
 
 #endif
diff --git a/include/Privileges.hpp b/include/Privileges.hpp
index d45d06fb153199d41c1962e33775b34b4c981eef..18a7f82caabbddf392e3a7c4a0321c0e0d420085 100644
--- a/include/Privileges.hpp
+++ b/include/Privileges.hpp
@@ -7,9 +7,9 @@
 class Privileges {
 
 public:
-	static void checkPrivileges(QWidget*, const QString, const QString);
+    static void checkPrivileges(QWidget*, const QString, const QString);
 
-	static bool isRoot();
+    static bool isRoot();
 };
 
 #endif // PRIVILEGES_HPP
diff --git a/include/ProcessHandler.hpp b/include/ProcessHandler.hpp
index 4fc5fc4def72c9b766c6a67fe113ec2b3e6c41c4..dec13b652a2941453ebd1f41d0d4f81bb1371a5a 100644
--- a/include/ProcessHandler.hpp
+++ b/include/ProcessHandler.hpp
@@ -6,11 +6,11 @@
 #define PROCESSHANDLER_HPP
 
 class ProcessHandler : protected QProcess {
-	Q_OBJECT
+    Q_OBJECT
 public:
-	ProcessHandler(QProcess::OpenMode mode);
+    ProcessHandler(QProcess::OpenMode mode);
 public:
-	QString exec(QString commands);
+    QString exec(QString commands);
 };
 
 #endif
diff --git a/include/Translation.hpp b/include/Translation.hpp
index 8ac06c7dbe3bfd7d109b9094a1998d9587fe97e3..13d9753c95e4e44c45bbfcb73c5fb3db68f44bae 100644
--- a/include/Translation.hpp
+++ b/include/Translation.hpp
@@ -4,19 +4,19 @@
 #include <QString>
 
 struct LANG {
-	enum {ENG = 0, HUN = 1};
+    enum {ENG = 0, HUN = 1};
 };
-QString TXT_APP_TITLE[] =	{ "SCH NetChecker",				"SCH NetChecker" };
-QString README_URL[] =		{ ":/res/readme_en.html",	":/res/readme_hu.html" };
-QString TXT_NEXT_BTN[] =	{ "Next",					"Tovább" };
-QString TXT_DIAG_GROUP[] =	{ "Running diagnostics",	"Diagnosztika futtatása" };
+QString TXT_APP_TITLE[] =    { "SCH NetChecker",                "SCH NetChecker" };
+QString README_URL[] =        { ":/res/readme_en.html",    ":/res/readme_hu.html" };
+QString TXT_NEXT_BTN[] =    { "Next",                    "Tovább" };
+QString TXT_DIAG_GROUP[] =    { "Running diagnostics",    "Diagnosztika futtatása" };
 QString TXT_EST_TIME[] =    { "Estimated time",         "Várható befejezés" };
 QString TXT_ALMOST_END[] =  { "Please be patient...",   "Kérem várjon türelemmel..." };
 QString TXT_FINISHED[] =    { "Finished.",              "Művelet befejeződött." };
-QString TXT_LOG_GROUP[] =	{ "Log",					"Napló" };
-QString TXT_CLIPB_BTN[] =	{ "Copy to clipboard",		"Másolás vágólapra" };
-QString TXT_SAVE_BTN[] =	{ "Save to file...",		"Mentés fájlba..." };
-QString TXT_SAVE_DIALOG[] =	{ "Save to...",				"Mentés helye..." };
+QString TXT_LOG_GROUP[] =    { "Log",                    "Napló" };
+QString TXT_CLIPB_BTN[] =    { "Copy to clipboard",        "Másolás vágólapra" };
+QString TXT_SAVE_BTN[] =    { "Save to file...",        "Mentés fájlba..." };
+QString TXT_SAVE_DIALOG[] =    { "Save to...",                "Mentés helye..." };
 QString TXT_ROOT_MSG_TITLE_WIN[] ={
     "Error",
     "Error"
diff --git a/main.cpp b/main.cpp
index c70ecec99ee78bfe586ad1ef6096242ecdc53987..a96f836e10befec311655bc92fa088616ead4ee5 100644
--- a/main.cpp
+++ b/main.cpp
@@ -4,8 +4,8 @@
 
 int main(int argc, char *argv[])
 {
-	QApplication app(argc, argv);
+    QApplication app(argc, argv);
     NetCheckerWindow ncw;
     ncw.show();
-	return app.exec();
+    return app.exec();
 }
diff --git a/netchecker.pro b/netchecker.pro
index b7b625935c17ac8c599fbba0907f2a90f66703d7..a1d0069d2c67fda605ee0add074706f9e36a6805 100644
--- a/netchecker.pro
+++ b/netchecker.pro
@@ -6,7 +6,7 @@ macx:ICON = res/app.hqx
 HEADERS     = \  
     include/NetCheckerWindow.hpp \
     include/Diagnostic.hpp \
-	include/Globals.hpp \
+    include/Globals.hpp \
     include/Translation.hpp \
     include/ProcessHandler.hpp \
     include/Privileges.hpp
@@ -16,7 +16,7 @@ SOURCES     = \
     src/Globals.cpp \
     src/NetCheckerWindow.cpp \
     src/Privileges.cpp \
-	src/ProcessHandler.cpp
+    src/ProcessHandler.cpp
 
 # install
 target.path = bin
diff --git a/res/readme_en.html b/res/readme_en.html
index eeb684753e965b5613a8ee1857ba8972a528d7e9..6b3c23e26cb0dba9395177c4986438cf8a6feffa 100644
--- a/res/readme_en.html
+++ b/res/readme_en.html
@@ -1,5 +1,5 @@
 <h3 align="center">Very English</h3>
 <p>
-	Big localization. <u>Bilingual as hell.</u><br/>
-	<b>Easy to youze.</b>
+    Big localization. <u>Bilingual as hell.</u><br/>
+    <b>Easy to youze.</b>
 </p>
diff --git a/res/readme_hu.html b/res/readme_hu.html
index f88d2524ea863eb0e2d80c2413d61bc3b42f4cb6..a12ae3e8c468361f81cb8457f157f2ce096daf42 100644
--- a/res/readme_hu.html
+++ b/res/readme_hu.html
@@ -1,5 +1,5 @@
 <h3 align="center">Magyar leírás</h3>
 <p>
-	Unicode, ékezetek, HTML. <u>Kezelhetőség.</u><br/>
-	<b>Na még mit mondjak...</b>
+    Unicode, ékezetek, HTML. <u>Kezelhetőség.</u><br/>
+    <b>Na még mit mondjak...</b>
 </p>
diff --git a/src/Diagnostic.cpp b/src/Diagnostic.cpp
index baeeb40c9ffa1291c66fc25f92e1b002bb075875..6903c4dde4a73e6af792e4568d8b4ec3645e8155 100644
--- a/src/Diagnostic.cpp
+++ b/src/Diagnostic.cpp
@@ -13,194 +13,194 @@
 #include <include/ProcessHandler.hpp>
 
 void Diagnostic::onStarted(){
-	double step = 100.0/func_vec.size();
-	double i = 1.0;
-	foreach (function_t fn, func_vec) {
-		emit Update(static_cast<int>(ceil(step*i)), (this->*fn)());
-		i += 1.0;
-	}
-	emit Quit();
+    double step = 100.0/func_vec.size();
+    double i = 1.0;
+    foreach (function_t fn, func_vec) {
+        emit Update(static_cast<int>(ceil(step*i)), (this->*fn)());
+        i += 1.0;
+    }
+    emit Quit();
 }
 
 Diagnostic::Diagnostic()
-	: func_vec({
-	   &Diagnostic::getOsInfo,
-	   &Diagnostic::getInterfaceInfo,
-	   &Diagnostic::getRoutingInfo,
-	   &Diagnostic::getDGPingOutput,
-	   &Diagnostic::getODPingOutput,
-	   &Diagnostic::getDNSLookup
-	}), tab(2, ' ')
+    : func_vec({
+       &Diagnostic::getOsInfo,
+       &Diagnostic::getInterfaceInfo,
+       &Diagnostic::getRoutingInfo,
+       &Diagnostic::getDGPingOutput,
+       &Diagnostic::getODPingOutput,
+       &Diagnostic::getDNSLookup
+    }), tab(2, ' ')
 {
-	INIT_GLOBALS();
+    INIT_GLOBALS();
 }
 
 
 QString Diagnostic::getRoutingInfo(){
-	ProcessHandler proc(QIODevice::ReadOnly);
-	QStringList out;
-
-	out << "- - - Routing - - - \n";
-
-	switch (CURRENT_OS){
-	case OS_WINDOWS:
-		out << proc.exec("netsh interface ipv4 show route");
-		//out << proc.exec("netsh interface ipv6 show route");
-		break;
-	case OS_LINUX:
-		out << proc.exec("netstat -A inet -rn");
-		//out << proc.exec("netstat -A inet6 -rn");
-		break;
-	case OS_OSX:
-		out << proc.exec("/usr/sbin/netstat -f inet -rn");
-		//out << proc.exec("/usr/sbin/netstat -f inet6 -rn");
-		break;
-	default:
-		static_assert(true, "This OS is not supported");
-		break;
-	}
-	return out.join(separator);
+    ProcessHandler proc(QIODevice::ReadOnly);
+    QStringList out;
+
+    out << "- - - Routing - - - \n";
+
+    switch (CURRENT_OS){
+    case OS_WINDOWS:
+        out << proc.exec("netsh interface ipv4 show route");
+        //out << proc.exec("netsh interface ipv6 show route");
+        break;
+    case OS_LINUX:
+        out << proc.exec("netstat -A inet -rn");
+        //out << proc.exec("netstat -A inet6 -rn");
+        break;
+    case OS_OSX:
+        out << proc.exec("/usr/sbin/netstat -f inet -rn");
+        //out << proc.exec("/usr/sbin/netstat -f inet6 -rn");
+        break;
+    default:
+        static_assert(true, "This OS is not supported");
+        break;
+    }
+    return out.join(separator);
 }
 
 
 QString Diagnostic::getInterfaceInfo(){
-	QList<QNetworkInterface> ifList = QNetworkInterface::allInterfaces();
-	QStringList out;
-
-	out << "- - - Interface Info - - - \n";
-	out << "\n";
-	foreach (QNetworkInterface iface, ifList){
-		out << QString("%1\n").arg(iface.humanReadableName());
-		out << QString("%1Address entries:\n").arg(tab);
-		{
-			int address_cntr = 0;
-			foreach (QNetworkAddressEntry netAddr, iface.addressEntries()){
-				out << QString("%1%1entry #%2\n").arg(tab).arg(address_cntr++);
-				out << QString("%1%1%1- broadcast addr: %2\n").arg(tab).arg(netAddr.broadcast().toString());
-				out << QString("%1%1%1- ip addr: %2\n").arg(tab).arg(netAddr.ip().toString());
-				out << QString("%1%1%1- subnetmask: %2\n").arg(tab).arg(netAddr.netmask().toString());
-			}
-		}
-		out << QString("%1- can broadcast? %2\n").arg(tab).arg(iface.flags().testFlag(QNetworkInterface::CanBroadcast)? "yes" : "no");
-		out << QString("%1- can multicast? %2\n").arg(tab).arg(iface.flags().testFlag(QNetworkInterface::CanMulticast)? "yes" : "no");
-		out << QString("%1- HW address: %2\n").arg(tab).arg(iface.hardwareAddress());
-		out << QString("%1- is loopback? %2\n").arg(tab).arg(iface.flags().testFlag(QNetworkInterface::IsLoopBack)? "yes" : "no");
-		out << QString("%1- is point-to-point? %2\n").arg(tab).arg(iface.flags().testFlag(QNetworkInterface::IsPointToPoint)? "yes" : "no");
-		out << QString("%1- is running? %2\n").arg(tab).arg(iface.flags().testFlag(QNetworkInterface::IsRunning)? "yes" : "no");
-		out << QString("%1- is up? %2\n").arg(tab).arg(iface.flags().testFlag(QNetworkInterface::IsUp)? "yes" : "no");
-		out << QString("%1- is valid? %2\n").arg(tab).arg(iface.isValid()? "yes" : "no");
-		out << QString("%1- internal name: %2\n").arg(tab).arg(iface.name());
-	}
-	out << QString("Local addresses:\n");
-	foreach (QHostAddress hostAddr, QNetworkInterface::allAddresses()){
-		out << QString("%1- %2\n").arg(tab).arg(hostAddr.toString());
-	}
-	return out.join(separator);
+    QList<QNetworkInterface> ifList = QNetworkInterface::allInterfaces();
+    QStringList out;
+
+    out << "- - - Interface Info - - - \n";
+    out << "\n";
+    foreach (QNetworkInterface iface, ifList){
+        out << QString("%1\n").arg(iface.humanReadableName());
+        out << QString("%1Address entries:\n").arg(tab);
+        {
+            int address_cntr = 0;
+            foreach (QNetworkAddressEntry netAddr, iface.addressEntries()){
+                out << QString("%1%1entry #%2\n").arg(tab).arg(address_cntr++);
+                out << QString("%1%1%1- broadcast addr: %2\n").arg(tab).arg(netAddr.broadcast().toString());
+                out << QString("%1%1%1- ip addr: %2\n").arg(tab).arg(netAddr.ip().toString());
+                out << QString("%1%1%1- subnetmask: %2\n").arg(tab).arg(netAddr.netmask().toString());
+            }
+        }
+        out << QString("%1- can broadcast? %2\n").arg(tab).arg(iface.flags().testFlag(QNetworkInterface::CanBroadcast)? "yes" : "no");
+        out << QString("%1- can multicast? %2\n").arg(tab).arg(iface.flags().testFlag(QNetworkInterface::CanMulticast)? "yes" : "no");
+        out << QString("%1- HW address: %2\n").arg(tab).arg(iface.hardwareAddress());
+        out << QString("%1- is loopback? %2\n").arg(tab).arg(iface.flags().testFlag(QNetworkInterface::IsLoopBack)? "yes" : "no");
+        out << QString("%1- is point-to-point? %2\n").arg(tab).arg(iface.flags().testFlag(QNetworkInterface::IsPointToPoint)? "yes" : "no");
+        out << QString("%1- is running? %2\n").arg(tab).arg(iface.flags().testFlag(QNetworkInterface::IsRunning)? "yes" : "no");
+        out << QString("%1- is up? %2\n").arg(tab).arg(iface.flags().testFlag(QNetworkInterface::IsUp)? "yes" : "no");
+        out << QString("%1- is valid? %2\n").arg(tab).arg(iface.isValid()? "yes" : "no");
+        out << QString("%1- internal name: %2\n").arg(tab).arg(iface.name());
+    }
+    out << QString("Local addresses:\n");
+    foreach (QHostAddress hostAddr, QNetworkInterface::allAddresses()){
+        out << QString("%1- %2\n").arg(tab).arg(hostAddr.toString());
+    }
+    return out.join(separator);
 }
 
 
 QString Diagnostic::getDGPingOutput(){
-	ProcessHandler proc(QIODevice::ReadOnly);
-	QStringList out;
-
-	out << "- - - Pinging Default Gateways - - -\n";
-
-	foreach (QString ip, DEF_GATEWAYS) {
-		switch (CURRENT_OS){
-		case OS_WINDOWS:
-			out << proc.exec(QString("ping -n 4 -w 1 %1").arg(ip));
-			break;
-		case OS_LINUX:
-			out << proc.exec(QString("ping -n -c 4 -W 1 %1").arg(ip));
-			break;
+    ProcessHandler proc(QIODevice::ReadOnly);
+    QStringList out;
+
+    out << "- - - Pinging Default Gateways - - -\n";
+
+    foreach (QString ip, DEF_GATEWAYS) {
+        switch (CURRENT_OS){
+        case OS_WINDOWS:
+            out << proc.exec(QString("ping -n 4 -w 1 %1").arg(ip));
+            break;
+        case OS_LINUX:
+            out << proc.exec(QString("ping -n -c 4 -W 1 %1").arg(ip));
+            break;
         case OS_OSX:
             out << proc.exec(QString("ping -n -c 4 -W 1 %1").arg(ip));
             break;
-		default:
-			static_assert(true, "This OS is not supported");
-			break;
-		}
-	}
-	return out.join(separator);
+        default:
+            static_assert(true, "This OS is not supported");
+            break;
+        }
+    }
+    return out.join(separator);
 }
 
 
 QString Diagnostic::getODPingOutput(){
-	ProcessHandler proc(QIODevice::ReadOnly);
-	QStringList out;
-
-	out << "- - - Pinging Outer Destinations - - -\n";
-
-	foreach (QString ip, OUTER_DEST) {
-		switch (CURRENT_OS){
-		case OS_WINDOWS:
-			out << proc.exec(QString("ping -n 4 -w 1 %1").arg(ip));
-			break;
-		case OS_LINUX:
-			out << proc.exec(QString("ping -c 4 -W 1 %1").arg(ip));
-			break;
-		case OS_OSX:
-			out << proc.exec(QString("ping -c 4 -W 1 %1").arg(ip));
-			break;
-		default:
-			static_assert(true, "This OS is not supported");
-			break;
-		}
-	}
-	return out.join(separator);
+    ProcessHandler proc(QIODevice::ReadOnly);
+    QStringList out;
+
+    out << "- - - Pinging Outer Destinations - - -\n";
+
+    foreach (QString ip, OUTER_DEST) {
+        switch (CURRENT_OS){
+        case OS_WINDOWS:
+            out << proc.exec(QString("ping -n 4 -w 1 %1").arg(ip));
+            break;
+        case OS_LINUX:
+            out << proc.exec(QString("ping -c 4 -W 1 %1").arg(ip));
+            break;
+        case OS_OSX:
+            out << proc.exec(QString("ping -c 4 -W 1 %1").arg(ip));
+            break;
+        default:
+            static_assert(true, "This OS is not supported");
+            break;
+        }
+    }
+    return out.join(separator);
 }
 
 
 QString Diagnostic::getOsInfo(){
-	ProcessHandler proc(QIODevice::ReadOnly);
-	QStringList out;
-	out << "- - - OS Version - - -\n";
-
-	switch (CURRENT_OS) {
-	case OS_WINDOWS:
-		{
-			/* this pattern removes leading/trailing/middle empty lines
-			 * it is tested to work without escaping the backslashes.
-			 * if the output is malformed feel free to escape them! */
-			QRegExp e("(?:^[\r\n]+)|(?:[\r\n]{2}(?=[\r\n]))|(?:[\r\n]+$)");
-			out << proc.exec("wmic os get Caption,CSDVersion /value").replace(e, "");
-		}
-		break;
-	case OS_LINUX:
-		out << proc.exec("lsb_release -a");
-		break;
-	case OS_OSX:
-		out << proc.exec("sw_vers");
-		break;
-	default:
-		static_assert(true, "This OS is not supported");
-		break;
-	}
-	return out.join(separator);
+    ProcessHandler proc(QIODevice::ReadOnly);
+    QStringList out;
+    out << "- - - OS Version - - -\n";
+
+    switch (CURRENT_OS) {
+    case OS_WINDOWS:
+        {
+            /* this pattern removes leading/trailing/middle empty lines
+             * it is tested to work without escaping the backslashes.
+             * if the output is malformed feel free to escape them! */
+            QRegExp e("(?:^[\r\n]+)|(?:[\r\n]{2}(?=[\r\n]))|(?:[\r\n]+$)");
+            out << proc.exec("wmic os get Caption,CSDVersion /value").replace(e, "");
+        }
+        break;
+    case OS_LINUX:
+        out << proc.exec("lsb_release -a");
+        break;
+    case OS_OSX:
+        out << proc.exec("sw_vers");
+        break;
+    default:
+        static_assert(true, "This OS is not supported");
+        break;
+    }
+    return out.join(separator);
 }
 
 
 QString Diagnostic::getDNSLookup(){
-	QStringList out;
-	out << "- - - DNS Lookup for sch.bme.hu - - -\n";
-	QEventLoop dns_event;
-	QDnsLookup dns_handle(QDnsLookup::ANY, DNS_ADDR);
-
-	dns_event.connect(&dns_handle, SIGNAL(finished()), &dns_event, SLOT(quit()));
-
-	foreach (QString nameserver, NS_ADDRS) {
-		dns_handle.setNameserver(QHostAddress(nameserver));
-		dns_handle.lookup();
-		dns_event.exec();
-		if (dns_handle.error() == QDnsLookup::NoError) {
-			out << QString("nameserver: %1\n").arg(nameserver);
-			foreach (const QDnsHostAddressRecord &record, dns_handle.hostAddressRecords()) {
-				out << QString("%1- %2\n").arg(tab).arg(record.value().toString());
-			}
-		}
-		else {
-			out << QString("nameserver: %1 - failed\n").arg(nameserver);
-		}
-	}
-	return out.join(separator);
+    QStringList out;
+    out << "- - - DNS Lookup for sch.bme.hu - - -\n";
+    QEventLoop dns_event;
+    QDnsLookup dns_handle(QDnsLookup::ANY, DNS_ADDR);
+
+    dns_event.connect(&dns_handle, SIGNAL(finished()), &dns_event, SLOT(quit()));
+
+    foreach (QString nameserver, NS_ADDRS) {
+        dns_handle.setNameserver(QHostAddress(nameserver));
+        dns_handle.lookup();
+        dns_event.exec();
+        if (dns_handle.error() == QDnsLookup::NoError) {
+            out << QString("nameserver: %1\n").arg(nameserver);
+            foreach (const QDnsHostAddressRecord &record, dns_handle.hostAddressRecords()) {
+                out << QString("%1- %2\n").arg(tab).arg(record.value().toString());
+            }
+        }
+        else {
+            out << QString("nameserver: %1 - failed\n").arg(nameserver);
+        }
+    }
+    return out.join(separator);
 }
diff --git a/src/Globals.cpp b/src/Globals.cpp
index 6606578e45f7685dd33cd950e0985b9ebd7f94a6..7531b095c0cceb46a77019f12167479e9eb291b8 100644
--- a/src/Globals.cpp
+++ b/src/Globals.cpp
@@ -9,27 +9,27 @@ QStringList NS_ADDRS;
 QString DNS_ADDR;
 
 void INIT_GLOBALS(){
-	DEF_GATEWAYS << "152.66.176.254";
-	DEF_GATEWAYS << "152.66.178.254";
-	DEF_GATEWAYS << "152.66.179.254";
-	DEF_GATEWAYS << "152.66.180.254";
-	DEF_GATEWAYS << "152.66.181.254";
-	DEF_GATEWAYS << "152.66.182.254";
-	DEF_GATEWAYS << "152.66.183.254";
-	DEF_GATEWAYS << "152.66.210.254";
-	DEF_GATEWAYS << "10.66.255.254";
-
-	OUTER_DEST << "152.66.0.1";
-	OUTER_DEST << "152.66.0.15";
-	OUTER_DEST << "8.8.8.8";
-	OUTER_DEST << "8.8.4.4";
-
-	NS_ADDRS << "152.66.208.1";
-	NS_ADDRS << "152.66.208.7";
-	NS_ADDRS << "8.8.8.8";
-	NS_ADDRS << "8.8.4.4";
-
-	DNS_ADDR = "sch.bme.hu";
+    DEF_GATEWAYS << "152.66.176.254";
+    DEF_GATEWAYS << "152.66.178.254";
+    DEF_GATEWAYS << "152.66.179.254";
+    DEF_GATEWAYS << "152.66.180.254";
+    DEF_GATEWAYS << "152.66.181.254";
+    DEF_GATEWAYS << "152.66.182.254";
+    DEF_GATEWAYS << "152.66.183.254";
+    DEF_GATEWAYS << "152.66.210.254";
+    DEF_GATEWAYS << "10.66.255.254";
+
+    OUTER_DEST << "152.66.0.1";
+    OUTER_DEST << "152.66.0.15";
+    OUTER_DEST << "8.8.8.8";
+    OUTER_DEST << "8.8.4.4";
+
+    NS_ADDRS << "152.66.208.1";
+    NS_ADDRS << "152.66.208.7";
+    NS_ADDRS << "8.8.8.8";
+    NS_ADDRS << "8.8.4.4";
+
+    DNS_ADDR = "sch.bme.hu";
 }
 
 #endif // GLOBALS_CPP
diff --git a/src/NetCheckerWindow.cpp b/src/NetCheckerWindow.cpp
index e543ef60ae90866e6d3c99b47f789b8e76684ddd..6fe54c8e425ed730a825dabf6b11a0d19512a151 100644
--- a/src/NetCheckerWindow.cpp
+++ b/src/NetCheckerWindow.cpp
@@ -8,327 +8,328 @@
 #include <include/Translation.hpp>
 
 NetCheckerWindow::NetCheckerWindow(){
-	/* default language is hungarian */
-	lang = LANG::HUN;
-	setWindowFlags(Qt::WindowCloseButtonHint);
-	this->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
-	this->setFixedSize(WINDOW_WIDTH, WINDOW_HEIGHT);
-	/* initialize stacked window structure */
-	initStackedWindow();
-	/* localization for texts in program */
-	initText();
+    /* default language is hungarian */
+    lang = LANG::HUN;
+    setWindowFlags(Qt::WindowCloseButtonHint);
+    this->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+    this->setFixedSize(WINDOW_WIDTH, WINDOW_HEIGHT);
+    this->setAttribute(Qt::WA_QuitOnClose, false);
+    /* initialize stacked window structure */
+    initStackedWindow();
+    /* localization for texts in program */
+    initText();
 }
 
 void NetCheckerWindow::initStackedWindow(){
-	global_l = new QVBoxLayout;
-	global_w = new QStackedWidget;
-	global_l->addWidget(global_w);
+    global_l = new QVBoxLayout;
+    global_w = new QStackedWidget;
+    global_l->addWidget(global_w);
 
-	/* remove margins and spacing from global layout */
-	global_l->setMargin(0);
-	global_l->setSpacing(0);
+    /* remove margins and spacing from global layout */
+    global_l->setMargin(0);
+    global_l->setSpacing(0);
 
-	initWelcomePage();
-	initDiagnosticPage();
+    initWelcomePage();
+    initDiagnosticPage();
 
-	setLayout(global_l);
+    setLayout(global_l);
 }
 
 void NetCheckerWindow::initWelcomePage(){
-	/* initialization */
-	welcome_page_l = new QHBoxLayout;
-	welcome_page_w = new QWidget;
+    /* initialization */
+    welcome_page_l = new QHBoxLayout;
+    welcome_page_w = new QWidget;
 
-	/* remove margins and spacing from welcome page layout */
-	welcome_page_l->setMargin(0);
-	welcome_page_l->setSpacing(0);
+    /* remove margins and spacing from welcome page layout */
+    welcome_page_l->setMargin(0);
+    welcome_page_l->setSpacing(0);
 
-	/* init the two sides: logo and readme */
-	initLogoSide();
-	initReadmeSide();
+    /* init the two sides: logo and readme */
+    initLogoSide();
+    initReadmeSide();
 
-	welcome_page_w->setLayout(welcome_page_l);
-	global_w->addWidget(welcome_page_w);
+    welcome_page_w->setLayout(welcome_page_l);
+    global_w->addWidget(welcome_page_w);
 }
 
 void NetCheckerWindow::initLogoSide(){
-	logo_side_w = new QWidget;
-	logo_side_l = new QVBoxLayout;
-
-	logo_side_l->setContentsMargins(9, 9, 0, 0);
-	logo_side_w->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Expanding);
-	logo_side_w->setFixedWidth(LOGO_WIDTH);
-
-	/* logo image at the left */
-	logo_image_w = new QLabel;
-	QSvgRenderer renderer(tr(":/res/logo.svg"));
-	int image_width = LOGO_WIDTH - 9;
-	QImage image(image_width, static_cast<int>(1.376888*image_width), QImage::Format_ARGB32);
-	image.fill(Qt::transparent);
-	QPainter painter(&image);
-	renderer.render(&painter);
-	QPixmap pix_logo = QPixmap::fromImage(image);
-	logo_image_w->setPixmap(pix_logo);
-	logo_image_w->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
-
-	/* flags for choosing language */
-	QWidget *flag_holder_w = new QWidget;
-	QHBoxLayout *flag_holder_l = new QHBoxLayout;
-	QPushButton *flag_eng_w = new QPushButton;
-	QPushButton *flag_hun_w = new QPushButton;
-	QPixmap pix_flag_eng(":/res/flag_eng.gif");
-	QPixmap pix_flag_hun(":/res/flag_hun.gif");
-	QIcon icon_eng(pix_flag_eng);
-	QIcon icon_hun(pix_flag_hun);
-	QSize icon_size(pix_flag_eng.width(), pix_flag_eng.height());
-
-	flag_eng_w->setIconSize(icon_size);
-	flag_eng_w->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
-	flag_eng_w->setFixedSize(icon_size.width()+6, icon_size.height()+6);
-	flag_eng_w->setIcon(icon_eng);
-
-	flag_hun_w->setIconSize(icon_size);
-	flag_hun_w->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
-	flag_hun_w->setFixedSize(icon_size.width()+6, icon_size.height()+6);
-	flag_hun_w->setIcon(icon_hun);
-
-	connect(flag_eng_w, SIGNAL(released()), this, SLOT(changeToEng()));
-	connect(flag_hun_w, SIGNAL(released()), this, SLOT(changeToHun()));
-
-	flag_holder_l->addWidget(flag_hun_w);
-	flag_holder_l->addWidget(flag_eng_w);
-	flag_holder_w->setLayout(flag_holder_l);
-
-	logo_side_l->addWidget(logo_image_w);
-	logo_side_l->addWidget(flag_holder_w);
-	logo_side_w->setLayout(logo_side_l);
-
-	welcome_page_l->addWidget(logo_side_w);
+    logo_side_w = new QWidget;
+    logo_side_l = new QVBoxLayout;
+
+    logo_side_l->setContentsMargins(9, 9, 0, 0);
+    logo_side_w->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Expanding);
+    logo_side_w->setFixedWidth(LOGO_WIDTH);
+
+    /* logo image at the left */
+    logo_image_w = new QLabel;
+    QSvgRenderer renderer(tr(":/res/logo.svg"));
+    int image_width = LOGO_WIDTH - 9;
+    QImage image(image_width, static_cast<int>(1.376888*image_width), QImage::Format_ARGB32);
+    image.fill(Qt::transparent);
+    QPainter painter(&image);
+    renderer.render(&painter);
+    QPixmap pix_logo = QPixmap::fromImage(image);
+    logo_image_w->setPixmap(pix_logo);
+    logo_image_w->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+
+    /* flags for choosing language */
+    QWidget *flag_holder_w = new QWidget;
+    QHBoxLayout *flag_holder_l = new QHBoxLayout;
+    QPushButton *flag_eng_w = new QPushButton;
+    QPushButton *flag_hun_w = new QPushButton;
+    QPixmap pix_flag_eng(":/res/flag_eng.gif");
+    QPixmap pix_flag_hun(":/res/flag_hun.gif");
+    QIcon icon_eng(pix_flag_eng);
+    QIcon icon_hun(pix_flag_hun);
+    QSize icon_size(pix_flag_eng.width(), pix_flag_eng.height());
+
+    flag_eng_w->setIconSize(icon_size);
+    flag_eng_w->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+    flag_eng_w->setFixedSize(icon_size.width()+6, icon_size.height()+6);
+    flag_eng_w->setIcon(icon_eng);
+
+    flag_hun_w->setIconSize(icon_size);
+    flag_hun_w->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+    flag_hun_w->setFixedSize(icon_size.width()+6, icon_size.height()+6);
+    flag_hun_w->setIcon(icon_hun);
+
+    connect(flag_eng_w, SIGNAL(released()), this, SLOT(changeToEng()));
+    connect(flag_hun_w, SIGNAL(released()), this, SLOT(changeToHun()));
+
+    flag_holder_l->addWidget(flag_hun_w);
+    flag_holder_l->addWidget(flag_eng_w);
+    flag_holder_w->setLayout(flag_holder_l);
+
+    logo_side_l->addWidget(logo_image_w);
+    logo_side_l->addWidget(flag_holder_w);
+    logo_side_w->setLayout(logo_side_l);
+
+    welcome_page_l->addWidget(logo_side_w);
 }
 
 void NetCheckerWindow::initReadmeSide(){
-	readme_side_w = new QWidget;
-	readme_side_l = new QVBoxLayout;
+    readme_side_w = new QWidget;
+    readme_side_l = new QVBoxLayout;
 
-	readme_side_w->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+    readme_side_w->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
 
-	/* textbox at the right */
-	text_w = new QTextEdit;
-	text_w->setReadOnly(true);
+    /* textbox at the right */
+    text_w = new QTextEdit;
+    text_w->setReadOnly(true);
 
-	/* next button */
-	next_button_w = new QPushButton;
-	next_button_w->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
-	connect(next_button_w, SIGNAL(released()), this, SLOT(nextPage()));
+    /* next button */
+    next_button_w = new QPushButton;
+    next_button_w->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+    connect(next_button_w, SIGNAL(released()), this, SLOT(nextPage()));
 
-	readme_side_l->addWidget(text_w);
-	readme_side_l->addWidget(next_button_w, 0, Qt::AlignRight);
-	readme_side_w->setLayout(readme_side_l);
+    readme_side_l->addWidget(text_w);
+    readme_side_l->addWidget(next_button_w, 0, Qt::AlignRight);
+    readme_side_w->setLayout(readme_side_l);
 
-	welcome_page_l->addWidget(readme_side_w);
+    welcome_page_l->addWidget(readme_side_w);
 }
 
 void NetCheckerWindow::initDiagnosticPage(){
-	diagnostic_page_w = new QWidget;
-	diagnostic_page_l = new QVBoxLayout;
-
-	/* progress bar */
-	progressbar_holder_w = new QGroupBox;
-	progressbar_holder_l = new QVBoxLayout;
-	progressbar_w = new QProgressBar;
-	progressbar_w->setRange(0, 100);
-	progressbar_w->setAlignment(Qt::AlignHCenter);
-
-	/* progress bar info */
-	QWidget *progress_info_holder_w = new QWidget;
-	QHBoxLayout *progress_info_holder_l = new QHBoxLayout;
-	progress_info = new QLabel;
-	progress_info_time = new QLabel;
-	progress_info->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
-	progress_info_time->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Expanding);
-	progress_info_time->setFixedWidth(20);
-	progress_info_time->setAlignment(Qt::AlignRight);
-	progress_info->setAlignment(Qt::AlignRight);
-
-	progress_info_holder_l->addWidget(progress_info);
-	progress_info_holder_l->addWidget(progress_info_time, 0, Qt::AlignRight);
-	progress_info_holder_l->setContentsMargins(0, 3, 3, 3);
-
-	progress_info_holder_w->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
-	progress_info_holder_w->setLayout(progress_info_holder_l);
-
-	progressbar_holder_w->setLayout(progressbar_holder_l);
-	progressbar_holder_l->addWidget(progressbar_w);
-	progressbar_holder_l->addWidget(progress_info_holder_w);
-	progressbar_holder_w->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
-
-	/* log */
-	log_holder_w = new QGroupBox;
-	log_holder_l = new QVBoxLayout;
-	log_w = new QTextEdit;
-	log_w->setReadOnly(true);
-	log_w->setLineWrapMode(QTextEdit::NoWrap);
+    diagnostic_page_w = new QWidget;
+    diagnostic_page_l = new QVBoxLayout;
+
+    /* progress bar */
+    progressbar_holder_w = new QGroupBox;
+    progressbar_holder_l = new QVBoxLayout;
+    progressbar_w = new QProgressBar;
+    progressbar_w->setRange(0, 100);
+    progressbar_w->setAlignment(Qt::AlignHCenter);
+
+    /* progress bar info */
+    QWidget *progress_info_holder_w = new QWidget;
+    QHBoxLayout *progress_info_holder_l = new QHBoxLayout;
+    progress_info = new QLabel;
+    progress_info_time = new QLabel;
+    progress_info->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+    progress_info_time->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Expanding);
+    progress_info_time->setFixedWidth(20);
+    progress_info_time->setAlignment(Qt::AlignRight);
+    progress_info->setAlignment(Qt::AlignRight);
+
+    progress_info_holder_l->addWidget(progress_info);
+    progress_info_holder_l->addWidget(progress_info_time, 0, Qt::AlignRight);
+    progress_info_holder_l->setContentsMargins(0, 3, 3, 3);
+
+    progress_info_holder_w->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
+    progress_info_holder_w->setLayout(progress_info_holder_l);
+
+    progressbar_holder_w->setLayout(progressbar_holder_l);
+    progressbar_holder_l->addWidget(progressbar_w);
+    progressbar_holder_l->addWidget(progress_info_holder_w);
+    progressbar_holder_w->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
+
+    /* log */
+    log_holder_w = new QGroupBox;
+    log_holder_l = new QVBoxLayout;
+    log_w = new QTextEdit;
+    log_w->setReadOnly(true);
+    log_w->setLineWrapMode(QTextEdit::NoWrap);
     log_w->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
     log_w->setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);
-	log_w->setFont(QFontDatabase::systemFont(QFontDatabase::FixedFont));
-	log_holder_w->setLayout(log_holder_l);
-	log_holder_l->addWidget(log_w);
-
-	/* buttons */
-	button_holder_w = new QWidget;
-	button_holder_l = new QHBoxLayout;
-	clipboard_button_w = new QPushButton;
-	save_button_w = new QPushButton;
-	clipboard_button_w->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
-	save_button_w->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
-	clipboard_button_w->setEnabled(false);
-	save_button_w->setEnabled(false);
-
-	connect(clipboard_button_w, SIGNAL(released()), this, SLOT(copyClipboard()));
-	connect(save_button_w, SIGNAL(released()), this, SLOT(saveToFile()));
-
-	button_holder_l->addWidget(clipboard_button_w);
-	button_holder_l->addWidget(save_button_w);
-	button_holder_w->setLayout(button_holder_l);
-
-	/* trying to align buttons */
-	button_holder_w->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
-	button_holder_l->setContentsMargins(12, 0, 12, 0);
-
-	diagnostic_page_l->addWidget(progressbar_holder_w);
-	diagnostic_page_l->addWidget(log_holder_w);
-	diagnostic_page_l->addWidget(button_holder_w, 0, Qt::AlignRight);
-	diagnostic_page_w->setLayout(diagnostic_page_l);
-
-	global_w->addWidget(diagnostic_page_w);
+    log_w->setFont(QFontDatabase::systemFont(QFontDatabase::FixedFont));
+    log_holder_w->setLayout(log_holder_l);
+    log_holder_l->addWidget(log_w);
+
+    /* buttons */
+    button_holder_w = new QWidget;
+    button_holder_l = new QHBoxLayout;
+    clipboard_button_w = new QPushButton;
+    save_button_w = new QPushButton;
+    clipboard_button_w->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+    save_button_w->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+    clipboard_button_w->setEnabled(false);
+    save_button_w->setEnabled(false);
+
+    connect(clipboard_button_w, SIGNAL(released()), this, SLOT(copyClipboard()));
+    connect(save_button_w, SIGNAL(released()), this, SLOT(saveToFile()));
+
+    button_holder_l->addWidget(clipboard_button_w);
+    button_holder_l->addWidget(save_button_w);
+    button_holder_w->setLayout(button_holder_l);
+
+    /* trying to align buttons */
+    button_holder_w->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+    button_holder_l->setContentsMargins(12, 0, 12, 0);
+
+    diagnostic_page_l->addWidget(progressbar_holder_w);
+    diagnostic_page_l->addWidget(log_holder_w);
+    diagnostic_page_l->addWidget(button_holder_w, 0, Qt::AlignRight);
+    diagnostic_page_w->setLayout(diagnostic_page_l);
+
+    global_w->addWidget(diagnostic_page_w);
 }
 
 void NetCheckerWindow::initText(){
-	/* set program title */
-	setWindowTitle(TXT_APP_TITLE[lang]);
-
-	/* set next button label */
-	next_button_w->setText(TXT_NEXT_BTN[lang]);
-
-	/* change the readme text but also cache it */
-	static QString readme_txt[2] = {QString(), QString()};
-	if (readme_txt[0].isEmpty()){
-		QFile readme_file_hun(README_URL[LANG::HUN]);
-		QFile readme_file_eng(README_URL[LANG::ENG]);
-		readme_file_hun.open(QIODevice::ReadOnly);
-		readme_file_eng.open(QIODevice::ReadOnly);
-		QTextStream readme_file_str_hun(&readme_file_hun);
-		QTextStream readme_file_str_eng(&readme_file_eng);
-		readme_file_str_hun.setCodec("UTF-8");
-		readme_file_str_eng.setCodec("UTF-8");
-		readme_txt[LANG::ENG] = readme_file_eng.readAll();
-		readme_txt[LANG::HUN] = readme_file_str_hun.readAll();
-		readme_file_hun.close();
-		readme_file_eng.close();
-	}
-	text_w->setHtml(readme_txt[lang]);
-
-	/* progress bar and buttons region */
-	progress_info->setText(TXT_EST_TIME[lang].append(":"));
-	progressbar_holder_w->setTitle(TXT_DIAG_GROUP[lang]);
-	log_holder_w->setTitle(TXT_LOG_GROUP[lang]);
-	clipboard_button_w->setText(TXT_CLIPB_BTN[lang]);
-	save_button_w->setText(TXT_SAVE_BTN[lang]);
+    /* set program title */
+    setWindowTitle(TXT_APP_TITLE[lang]);
+
+    /* set next button label */
+    next_button_w->setText(TXT_NEXT_BTN[lang]);
+
+    /* change the readme text but also cache it */
+    static QString readme_txt[2] = {QString(), QString()};
+    if (readme_txt[0].isEmpty()){
+        QFile readme_file_hun(README_URL[LANG::HUN]);
+        QFile readme_file_eng(README_URL[LANG::ENG]);
+        readme_file_hun.open(QIODevice::ReadOnly);
+        readme_file_eng.open(QIODevice::ReadOnly);
+        QTextStream readme_file_str_hun(&readme_file_hun);
+        QTextStream readme_file_str_eng(&readme_file_eng);
+        readme_file_str_hun.setCodec("UTF-8");
+        readme_file_str_eng.setCodec("UTF-8");
+        readme_txt[LANG::ENG] = readme_file_eng.readAll();
+        readme_txt[LANG::HUN] = readme_file_str_hun.readAll();
+        readme_file_hun.close();
+        readme_file_eng.close();
+    }
+    text_w->setHtml(readme_txt[lang]);
+
+    /* progress bar and buttons region */
+    progress_info->setText(TXT_EST_TIME[lang].append(":"));
+    progressbar_holder_w->setTitle(TXT_DIAG_GROUP[lang]);
+    log_holder_w->setTitle(TXT_LOG_GROUP[lang]);
+    clipboard_button_w->setText(TXT_CLIPB_BTN[lang]);
+    save_button_w->setText(TXT_SAVE_BTN[lang]);
 }
 
 void NetCheckerWindow::nextPage(){
-	/* turns page */
-	global_w->setCurrentIndex(1);
-
-	/* set up diagnostic + wiring some shit */
-	Diagnostic *diag_obj = new Diagnostic;
-	QThread *diag_thread = new QThread();
-	diag_obj->moveToThread(diag_thread);
-
-	/* thread start -> diagnostic start */
-	QObject::connect(diag_thread, SIGNAL(started()), diag_obj, SLOT(onStarted()));
-	/* update -> window */
-	QObject::connect(diag_obj, SIGNAL(Update(int,QString)), this, SLOT(updateInfos(int,QString)));
-	/* quit diagnostic -> quit thread */
-	QObject::connect(diag_obj, SIGNAL(Quit()), diag_thread, SLOT(quit()));
-	/* thread finished -> window's finish action */
-	QObject::connect(diag_thread, SIGNAL(finished()), this, SLOT(finishAction()));
-	diag_thread->start();
-
-	/* set up timer */
-	progress_timer = new QTimer(this);
-	connect(progress_timer, SIGNAL(timeout()), this, SLOT(incrementTime()));
-	progress_timer->setSingleShot(true);
-	progress_timer->start();
+    /* turns page */
+    global_w->setCurrentIndex(1);
+
+    /* set up diagnostic + wiring some shit */
+    Diagnostic *diag_obj = new Diagnostic;
+    QThread *diag_thread = new QThread();
+    diag_obj->moveToThread(diag_thread);
+
+    /* thread start -> diagnostic start */
+    QObject::connect(diag_thread, SIGNAL(started()), diag_obj, SLOT(onStarted()));
+    /* update -> window */
+    QObject::connect(diag_obj, SIGNAL(Update(int,QString)), this, SLOT(updateInfos(int,QString)));
+    /* quit diagnostic -> quit thread */
+    QObject::connect(diag_obj, SIGNAL(Quit()), diag_thread, SLOT(quit()));
+    /* thread finished -> window's finish action */
+    QObject::connect(diag_thread, SIGNAL(finished()), this, SLOT(finishAction()));
+    diag_thread->start();
+
+    /* set up timer */
+    progress_timer = new QTimer(this);
+    connect(progress_timer, SIGNAL(timeout()), this, SLOT(incrementTime()));
+    progress_timer->setSingleShot(true);
+    progress_timer->start();
 }
 
 void NetCheckerWindow::updateInfos(int progress_value, const QString info){
-	progressbar_w->setValue(progress_value);
-	log_w->append(info);
+    progressbar_w->setValue(progress_value);
+    log_w->append(info);
 }
 
 void NetCheckerWindow::finishAction(){
-	/* if diagnostic is over, stop the timer and change text to finished */
-	progress_timer->stop();
-	if (!progress_info_time->isHidden()){
-		progress_info_time->hide();
-	}
-	progress_info->setText(TXT_FINISHED[lang]);
-
-	/* enable save buttons */
-	clipboard_button_w->setEnabled(true);
-	save_button_w->setEnabled(true);
+    /* if diagnostic is over, stop the timer and change text to finished */
+    progress_timer->stop();
+    if (!progress_info_time->isHidden()){
+        progress_info_time->hide();
+    }
+    progress_info->setText(TXT_FINISHED[lang]);
+
+    /* enable save buttons */
+    clipboard_button_w->setEnabled(true);
+    save_button_w->setEnabled(true);
 }
 
 void NetCheckerWindow::copyClipboard(){
-	QClipboard *clipboard = QApplication::clipboard();
-	clipboard->setText(log_w->toPlainText());
+    QClipboard *clipboard = QApplication::clipboard();
+    clipboard->setText(log_w->toPlainText());
 }
 
 void NetCheckerWindow::saveToFile(){
-	QString username = qgetenv("USER");
-	if (username.isEmpty())
-		username = qgetenv("USERNAME");
-	QString filename = QFileDialog::getExistingDirectory(0, TXT_SAVE_DIALOG[lang]);
-	filename.append(tr("/%1_%2.txt").arg(username).arg(QDateTime::currentDateTime().toString("yyyy-MM-dd_h-m-s")));
-	if (!filename.isEmpty()){
-		QFile file(filename);
-		if (file.open(QIODevice::WriteOnly | QIODevice::Text)){
-			QTextStream stream(&file);
-			stream.setCodec("UTF-8");
-			stream << log_w->toPlainText();
-			stream.flush();
-			file.close();
-		}
-	}
+    QString username = qgetenv("USER");
+    if (username.isEmpty())
+        username = qgetenv("USERNAME");
+    QString filename = QFileDialog::getExistingDirectory(0, TXT_SAVE_DIALOG[lang]);
+    filename.append(tr("/%1_%2.txt").arg(username).arg(QDateTime::currentDateTime().toString("yyyy-MM-dd_h-m-s")));
+    if (!filename.isEmpty()){
+        QFile file(filename);
+        if (file.open(QIODevice::WriteOnly | QIODevice::Text)){
+            QTextStream stream(&file);
+            stream.setCodec("UTF-8");
+            stream << log_w->toPlainText();
+            stream.flush();
+            file.close();
+        }
+    }
 }
 
 void NetCheckerWindow::changeToHun(){
-	if (lang != LANG::HUN){
-		lang = LANG::HUN;
-		initText();
-	}
+    if (lang != LANG::HUN){
+        lang = LANG::HUN;
+        initText();
+    }
 }
 
 void NetCheckerWindow::changeToEng(){
-	if (lang != LANG::ENG){
-		lang = LANG::ENG;
-		initText();
-	}
+    if (lang != LANG::ENG){
+        lang = LANG::ENG;
+        initText();
+    }
 }
 
 void NetCheckerWindow::incrementTime(){
-	static int count = 53;
-	if (count >= 0){
-		progress_info_time->setText(QString("%1s").arg(count--));
-		progress_timer->start(1000);
-	}
-	else {
-		progress_info->setText(TXT_ALMOST_END[lang]);
-		if (!progress_info_time->isHidden()){
-			progress_info_time->hide();
-		}
-	}
+    static int count = 53;
+    if (count >= 0){
+        progress_info_time->setText(QString("%1s").arg(count--));
+        progress_timer->start(1000);
+    }
+    else {
+        progress_info->setText(TXT_ALMOST_END[lang]);
+        if (!progress_info_time->isHidden()){
+            progress_info_time->hide();
+        }
+    }
 }
 
 void NetCheckerWindow::show(){
diff --git a/src/Privileges.cpp b/src/Privileges.cpp
index 75859b49d904d3bcfa570b834ab3631bd45718ba..d9527523f1112274651aa4c58bd5de7515a69f70 100644
--- a/src/Privileges.cpp
+++ b/src/Privileges.cpp
@@ -9,33 +9,33 @@
 #define PRIVILEGES_CPP
 
 void Privileges::checkPrivileges(QWidget *parent, const QString title, const QString message){
-	if (!isRoot()){
+    if (!isRoot()){
         QMessageBox::critical(parent, title, message, QMessageBox::Ok, QMessageBox::NoButton);
         parent->close();
-	}
+    }
 }
 
 #if defined(Q_OS_WIN)
-	#include <windows.h>
-	bool Privileges::isRoot(){
-		BOOL fRet = FALSE;
-		HANDLE hToken = NULL;
-		if( OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &hToken)){
-			TOKEN_ELEVATION Elevation;
-			DWORD cbSize = sizeof(TOKEN_ELEVATION);
-			if(GetTokenInformation(hToken, TokenElevation, &Elevation, sizeof(Elevation),&cbSize)){
-				fRet = Elevation.TokenIsElevated;
-			}
-		}
-		if(hToken){
-			CloseHandle(hToken);
-		}
-		return fRet;
-	}
+    #include <windows.h>
+    bool Privileges::isRoot(){
+        BOOL fRet = FALSE;
+        HANDLE hToken = NULL;
+        if( OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &hToken)){
+            TOKEN_ELEVATION Elevation;
+            DWORD cbSize = sizeof(TOKEN_ELEVATION);
+            if(GetTokenInformation(hToken, TokenElevation, &Elevation, sizeof(Elevation),&cbSize)){
+                fRet = Elevation.TokenIsElevated;
+            }
+        }
+        if(hToken){
+            CloseHandle(hToken);
+        }
+        return fRet;
+    }
 #elif defined(Q_OS_LINUX)
-	#include <unistd.h>
-	bool Privileges::isRoot(){
-		return !(getuid() && geteuid());
+    #include <unistd.h>
+    bool Privileges::isRoot(){
+        return !(getuid() && geteuid());
     }
 #elif defined(Q_OS_OSX)
     #include <unistd.h>
@@ -43,7 +43,7 @@ void Privileges::checkPrivileges(QWidget *parent, const QString title, const QSt
         return !(getuid() && geteuid());
     }
 #else
-	#error "This OS is not supported yet!"
+    #error "This OS is not supported yet!"
 #endif
 
 #endif // PRIVILEGES_CPP
diff --git a/src/ProcessHandler.cpp b/src/ProcessHandler.cpp
index c7122ac298be32e8dfea3408eb252d166d5ae692..c3ed36445d150ba2df670fa01710f0bf2535a828 100644
--- a/src/ProcessHandler.cpp
+++ b/src/ProcessHandler.cpp
@@ -8,15 +8,15 @@
 #define PROCESSHANDLER_CPP
 
 ProcessHandler::ProcessHandler(QProcess::OpenMode mode): QProcess() {
-	setOpenMode(mode);
+    setOpenMode(mode);
 }
 QString ProcessHandler::exec(QString commands){
-	start(commands);
-	if (!waitForFinished()){
-		return tr("Error occured. Command was: %1\n").arg(commands);
-	}
-	QByteArray ba = readAllStandardOutput();
-	return ba;
+    start(commands);
+    if (!waitForFinished()){
+        return tr("Error occured. Command was: %1\n").arg(commands);
+    }
+    QByteArray ba = readAllStandardOutput();
+    return ba;
 }
 
 #endif