diff --git a/code/ryzom/tools/client/ryzom_installer/src/configfile.cpp b/code/ryzom/tools/client/ryzom_installer/src/configfile.cpp
index 7b3952a22..f23976cd9 100644
--- a/code/ryzom/tools/client/ryzom_installer/src/configfile.cpp
+++ b/code/ryzom/tools/client/ryzom_installer/src/configfile.cpp
@@ -27,7 +27,8 @@
 CConfigFile *CConfigFile::s_instance = NULL;
 
 CConfigFile::CConfigFile(QObject *parent):QObject(parent), m_version(-1),
-	m_defaultServerIndex(0), m_defaultProfileIndex(0), m_use64BitsClient(false), m_shouldUninstallOldClient(true)
+	m_defaultServerIndex(0), m_defaultProfileIndex(0), m_use64BitsClient(false), m_shouldUninstallOldClient(true),
+	m_uninstallingOldClient(false)
 {
 	s_instance = this;
 
@@ -461,6 +462,16 @@ void CConfigFile::setShouldUninstallOldClient(bool on)
 	m_shouldUninstallOldClient = on;
 }
 
+bool CConfigFile::uninstallingOldClient() const
+{
+	return m_uninstallingOldClient;
+}
+
+void CConfigFile::setUninstallingOldClient(bool on)
+{
+	m_uninstallingOldClient = on;
+}
+
 QString CConfigFile::expandVariables(const QString &str) const
 {
 	QString res = str;
@@ -972,7 +983,7 @@ OperationStep CConfigFile::getInstallNextStep() const
 	if (!settings.contains("InstallLocation")) return CreateAddRemoveEntry;
 #endif
 
-	if (m_shouldUninstallOldClient && !getSrcServerDirectory().isEmpty() && QFile::exists(getSrcServerDirectory() + "/Uninstall.exe"))
+	if (!m_uninstallingOldClient && m_shouldUninstallOldClient && !getSrcServerDirectory().isEmpty() && QFile::exists(getSrcServerDirectory() + "/Uninstall.exe"))
 	{
 		return UninstallOldClient;
 	}
diff --git a/code/ryzom/tools/client/ryzom_installer/src/configfile.h b/code/ryzom/tools/client/ryzom_installer/src/configfile.h
index b2a4ae7e5..5c2a4dacc 100644
--- a/code/ryzom/tools/client/ryzom_installer/src/configfile.h
+++ b/code/ryzom/tools/client/ryzom_installer/src/configfile.h
@@ -109,6 +109,9 @@ public:
 	bool shouldUninstallOldClient() const;
 	void setShouldUninstallOldClient(bool on);
 
+	bool uninstallingOldClient() const;
+	void setUninstallingOldClient(bool on);
+
 	QString expandVariables(const QString &str) const;
 
 	QString getClientArch() const;
@@ -147,6 +150,7 @@ private:
 	QString m_srcDirectory;
 	bool m_use64BitsClient;
 	bool m_shouldUninstallOldClient;
+	bool m_uninstallingOldClient;
 	QString m_language;
 
 	QString m_defaultConfigPath;
diff --git a/code/ryzom/tools/client/ryzom_installer/src/main.cpp b/code/ryzom/tools/client/ryzom_installer/src/main.cpp
index 6a9662c4f..3d7ee1d1c 100644
--- a/code/ryzom/tools/client/ryzom_installer/src/main.cpp
+++ b/code/ryzom/tools/client/ryzom_installer/src/main.cpp
@@ -86,6 +86,11 @@ int main(int argc, char *argv[])
 	_CrtSetDbgFlag (_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF);
 #endif
 
+#ifdef Q_OS_WIN
+	// to fix the bug with QFileDialog::getExistingDirectory hanging under Windows
+	CoInitialize(NULL);
+#endif
+
 	NLMISC::CApplicationContext appContext;
 
 	QApplication app(argc, argv);
@@ -218,8 +223,10 @@ int main(int argc, char *argv[])
 
 		if (step == Done)
 		{
+#if defined(Q_OS_WIN) && !defined(_DEBUG)
 			// restart Installer, so it could be copied in TEMP and allowed to update itself
 			if (QProcess::startDetached(QApplication::applicationFilePath(), QApplication::arguments())) return 0;
+#endif
 		}
 	}
 
diff --git a/code/ryzom/tools/client/ryzom_installer/src/mainwindow.cpp b/code/ryzom/tools/client/ryzom_installer/src/mainwindow.cpp
index 55aa3b5bc..0f196a787 100644
--- a/code/ryzom/tools/client/ryzom_installer/src/mainwindow.cpp
+++ b/code/ryzom/tools/client/ryzom_installer/src/mainwindow.cpp
@@ -41,6 +41,11 @@ CMainWindow::CMainWindow():QMainWindow()
 	connect(m_downloader, SIGNAL(htmlPageContent(QString)), SLOT(onHtmlPageContent(QString)));
 
 	connect(actionProfiles, SIGNAL(triggered()), SLOT(onProfiles()));
+
+	// remove debug options
+	actionSettings->setVisible(false);
+	actionUninstall->setVisible(false);
+
 	connect(actionSettings, SIGNAL(triggered()), SLOT(onSettings()));
 	connect(actionUninstall, SIGNAL(triggered()), SLOT(onUninstall()));
 	connect(actionQuit, SIGNAL(triggered()), SLOT(onQuit()));
@@ -60,6 +65,7 @@ CMainWindow::CMainWindow():QMainWindow()
 	setFixedHeight(height());
 
 	updateProfiles();
+	updateButtons();
 }
 
 CMainWindow::~CMainWindow()
@@ -83,6 +89,28 @@ void CMainWindow::updateProfiles()
 	profilesComboBox->setModel(new CProfilesModel(this));
 }
 
+void CMainWindow::updateButtons()
+{
+	int profileIndex = profilesComboBox->currentIndex();
+
+	if (profileIndex < 0) return;
+
+	CConfigFile *config = CConfigFile::getInstance();
+
+	const CProfile &profile = config->getProfile(profileIndex);
+	const CServer &server = config->getServer(profile.server);
+
+	// get full path of client executable
+	QString executable = profile.getClientFullPath();
+
+	playButton->setEnabled(!executable.isEmpty() && QFile::exists(executable));
+
+	// get full path of configuration executable
+	executable = server.getConfigurationFullPath();
+
+	configureButton->setEnabled(!executable.isEmpty() && QFile::exists(executable));
+}
+
 void CMainWindow::onPlayClicked()
 {
 	int profileIndex = profilesComboBox->currentIndex();
@@ -123,6 +151,7 @@ void CMainWindow::onConfigureClicked()
 	const CProfile &profile = config->getProfile(profileIndex);
 	const CServer &server = config->getServer(profile.server);
 
+	// get full path of configuration executable
 	QString executable = server.getConfigurationFullPath();
 
 	if (executable.isEmpty() || !QFile::exists(executable)) return;
@@ -262,4 +291,6 @@ void CMainWindow::onProfileChanged(int profileIndex)
 
 	// load changelog
 	m_downloader->getHtmlPageContent(config->expandVariables(server.displayUrl));
+
+	updateButtons();
 }
diff --git a/code/ryzom/tools/client/ryzom_installer/src/mainwindow.h b/code/ryzom/tools/client/ryzom_installer/src/mainwindow.h
index 0f7d88138..7449b2039 100644
--- a/code/ryzom/tools/client/ryzom_installer/src/mainwindow.h
+++ b/code/ryzom/tools/client/ryzom_installer/src/mainwindow.h
@@ -61,6 +61,7 @@ protected:
 	void closeEvent(QCloseEvent *e);
 
 	void updateProfiles();
+	void updateButtons();
 
 	QWinTaskbarButton *m_button;
 	CDownloader *m_downloader;
diff --git a/code/ryzom/tools/client/ryzom_installer/src/operationdialog.cpp b/code/ryzom/tools/client/ryzom_installer/src/operationdialog.cpp
index da7a2f52d..5f3215e31 100644
--- a/code/ryzom/tools/client/ryzom_installer/src/operationdialog.cpp
+++ b/code/ryzom/tools/client/ryzom_installer/src/operationdialog.cpp
@@ -92,7 +92,7 @@ void COperationDialog::processNextStep()
 {
 	if (operationShouldStop())
 	{
-		reject();
+		rejectDelayed();
 		return;
 	}
 
@@ -184,7 +184,7 @@ void COperationDialog::processInstallNextStep()
 		break;
 
 		case Done:
-		accept();
+		acceptDelayed();
 		break;
 
 		default:
@@ -253,6 +253,8 @@ void COperationDialog::updateAddRemoveComponents()
 
 void COperationDialog::processUpdateProfilesNextStep()
 {
+	m_currentOperation = tr("Update profiles");
+
 	// for "update profiles" operations, we set installer to false when components are updated,
 	// since we're not using this variable
 	if (m_addComponents.installer && m_removeComponents.installer)
@@ -344,6 +346,8 @@ void COperationDialog::processUpdateProfilesNextStep()
 	}
 
 	updateAddRemoveEntry();
+
+	acceptDelayed();
 }
 
 void COperationDialog::processUninstallNextStep()
@@ -369,7 +373,7 @@ void COperationDialog::processUninstallNextStep()
 	else
 	{
 		// done
-		accept();
+		acceptDelayed();
 	}
 }
 
@@ -460,7 +464,7 @@ void COperationDialog::onProgressStop()
 	m_button->progress()->hide();
 #endif
 
-	reject();
+	rejectDelayed();
 }
 
 void COperationDialog::onProgressProgress(qint64 current, const QString &filename)
@@ -789,9 +793,14 @@ void COperationDialog::uninstallOldClient()
 
 			if (button == QMessageBox::Yes)
 			{
+				// remember the choice
 				CConfigFile::getInstance()->setShouldUninstallOldClient(true);
 
+				// launch old uninstaller
 				QDesktopServices::openUrl(QUrl::fromLocalFile(uninstaller));
+
+				// to not ask twice
+				CConfigFile::getInstance()->setUninstallingOldClient(true);
 			}
 			else
 			{
@@ -1247,3 +1256,15 @@ void COperationDialog::renamePartFile()
 		QFile::rename(partFile, finalFile);
 	}
 }
+
+void COperationDialog::acceptDelayed()
+{
+	// wait 500ms before to call accept()
+	QTimer::singleShot(500, this, SLOT(accept()));
+}
+
+void COperationDialog::rejectDelayed()
+{
+	// wait 500ms before to call reject()
+	QTimer::singleShot(500, this, SLOT(reject()));
+}
diff --git a/code/ryzom/tools/client/ryzom_installer/src/operationdialog.h b/code/ryzom/tools/client/ryzom_installer/src/operationdialog.h
index e9966c4d2..d2172815c 100644
--- a/code/ryzom/tools/client/ryzom_installer/src/operationdialog.h
+++ b/code/ryzom/tools/client/ryzom_installer/src/operationdialog.h
@@ -133,6 +133,10 @@ protected:
 
 	void renamePartFile();
 
+	// hacks to prevent an infinite loop
+	void acceptDelayed();
+	void rejectDelayed();
+
 	QWinTaskbarButton *m_button;
 	CDownloader *m_downloader;