Game Crashes and flashing screens

[DzrtFox]

OK I checked all tabs (and ran all tests) using DXDiag and no conflicts or problems were found. I had already checked background tasks and closed everything except for Explorer and Systray before running it.

I'm using an on-board sound chip, looking in my device manager it just says "Via AC '97 Audio Controller". All DirectSound tests run fine in DXDiag.

I will try running with sound off for a little while and see if it helps. I guess I should've clarified earlier that I am usually able to play a few turns before the freeze-up happens. It generally seems to happen after I've played 3 or 4 turns, but it has also happened 3 separate times when trying to play a single PBEM turn...