Before running this, you might first try to retsore Windows Help and Support and System Information.
To restore Windows files to the original state run the Windows System File Checker (sfc.exe), with the command:
You'll need to run it from the Windows native console, so if you are in Remote Desktop, use the console switch:
The program will need the original Windows CD. To use a different source directory, i.e. you have a copy of the windows CD in a local folder, change the registry key at:
For detailed information on using this tool see here.