You could boot a Knoppix CD and fix you files.
www.knoppix.net=>download the CD=> burn it=>boot the machine from the CD.
You could even download it in a virus ridden machine.
It doesn't catch viruses because it's Linux.
Doesn't change you HDD files (unless you want it to).
You can even use it as a regular OS instead of windows.
Graham.
May 2006