Firefox konnte nicht gestartet werden, weil die Anwendungskonfiguration nicht korrekt ist / Firefox failed to start because the application configuration is incorrect

After updating my Firefox to version 10 it refused to start. I tried a lot of things but nothing helped. Today I finally found a solution for this issue. It´s a problem with Microsoft Visual C++ 2005 and it appears mainly when you´re using Windows XP 32-bit with Service Pack 3. So here´s the solution:

1.) You need the Microsoft Visual C++ 2005 Service Pack 1 Redistributable Package ATL Security Update from here:

2.) Be aware that you download the correct package:

  • vcredist_x86.exe – for Windows XP, Windows Vista and Windows 7 (32-bit version – recommend for most users)
  • vcredist_x64.exe – for Windows XP, Windows Vista and Windows 7 (64-bit version)
  • vcredist_IA64.exe – for Intel Itanium based computers

3.) After the download finished, install the update

4.) Restart your computer

5.) Enjoy your working Firefox