Added OS check to installer.

etc/check_os.nsh

@@ -0,0 +1,25 @@
+Function .onInit
+	System::Call 'kernel32::CreateMutexA(i 0, i 0, t "{79d6a7e5-35af-47b1-a7d6-f20d0e5df772}") i .r1 ?e'
+	Pop $0
+	${If} $0 <> 0
+		MessageBox MB_ICONSTOP|MB_TOPMOST "Sorry, the installer is already running!"
+		Quit
+	${EndIf}
+
+	; --------
+	
+	${IfNot} ${IsNT}
+		MessageBox MB_TOPMOST|MB_ICONSTOP "Sorry, this application does NOT support Windows 9x or Windows ME!"
+		Quit
+	${EndIf}
+
+	${If} ${AtMostWinNT4}
+		${StdUtils.GetParameter} $R0 "Update" "?"
+		${If} $R0 == "?"
+			MessageBox MB_TOPMOST|MB_ICONSTOP "Sorry, your platform is not supported anymore. Installation aborted!$\nThe minimum required platform is Windows 2000."
+		${Else}
+			MessageBox MB_TOPMOST|MB_ICONSTOP "Sorry, your platform is not supported anymore. Update not possible!$\nThe minimum required platform is Windows 2000."
+		${EndIf}
+		Quit
+	${EndIf}
+FunctionEnd

src/version.h

@@ -21,7 +21,7 @@
 
 #define VER_X264_MAJOR 2
 #define VER_X264_MINOR 0
-#define VER_X264_PATCH 61
+#define VER_X264_PATCH 62
 
 #define VER_X264_MINIMUM_REV 2146
 #define VER_X264_CURRENT_API 120