I am running Windows Vista and am receiving the following errors when installing SQL Server 2008 Express with Advanced Services: I looked into the provided link - http://support.microsoft.com/kb/300956 - for repairing the performance counter registry hive, but my PC doesn't have the specific files...

I am getting the same error using Windows XP service pack 3. At first it seemed that the Windows PowerShell dependancy was not installing, despite already being so. After looking at other threads, I tried uninstalling this through "Add/Remove Programs", but this did not help at all. Retrying...