OK great
Have you tried it in Windows safe mode yet by chance? If not try it and see if we still get the same problem.
I noticed on another user who has a german system that any .txt, .inf or .manifest files all come back ok, only the dll, dat, exe and reg files come back as bad, seems to be related to only certain file types, so makes me think it might be a 3rd party program getting in the way, so in safe mode we can at least make sure no program is getting in the way.
So far 3 people have had this problem, but all are on non english systems, and only certain file types are coming back as different, yet when I have the user email me the files and I check them they are perfect, so I am digging trying to find the common factor
Shane