I'm dealing with a very strange problem when I'm working with the latest version of OllyDbg. The executable that I'm trying to load all of a sudden won't load even without OllyDbg. I try to execute the file and I get a GPF right away before even getting into the program. It's almost as if some system file got changed or corrupted.

My OS is Windows XP without SP1.

Here's what I've done to try and get this executable functioning again:
1. I've replaced the file in question with a backup.
2. I've done a repair install of Windows XP
3. I've deleted OllyDbg from my system.
4. I've deleted anything in c:\windows\prefetch

Nothing works except doing a clean install of XP.

Anyways does anyone know if OllyDbg changes any system files. Any ideas?