I am using Windows Vista as my operating system and everything was working fine before i upgrade to Windows Installer version 2.0, but after installing it whenever i am trying to start it at that time i am getting the following message as The Windows Installer Service could not be accessed. This can occur if you are running Windows in safe mode, or the Windows Installer is not correctly installed. Contact your support personnel for assistance. Can anyone solve this problem for me. Thanks in Advance.