I've wasted an hour solving this one. Here's the symptom. Your application crashes on Windows Vista almost immediately after it starts. If you look at the "Details", you see something like:
Problem Event Name: APPCRASH
Application Name: xxxxx
Fault Module Name: StackHash_1703
Fault Module Version: 0.0.0.0
The problem is that there's no such module as "StackHash_1703", so this appears to be some special case in Windows. I tried turning off antivirus and enabling compatibility mode, but the application still would not work.
The problem was that I had DEP (Data Execution Protection) enabled. For whatever reason, the error message gave me the AppCrash error above instead of the standard message about "DEP has closed the program."
To solve the problem, I added the application to the DEP exclusion list and everything worked again.
If the application that's crashing is video related (such as MovieMaker or Media Player), then your problem is probably caused by an old versions of Nero or an old video Codec.