Hi man and thanks,

Hmmm.... Obviously XP is not the most optimal OS for MTW there was, it has long history of screwing things up - and that in numerous ways... My guess is that there is something within the files that your XP-configuration really hates and can't handle. Don't have a clue what that may exactly be. I think your best option so far is still to change drivers as I think those are the culprit here. Catalysts 9.5 functions on HD4800-series and Redux (XP32bit), so try those or later drivers. You are probably stuck with this for as long as you do not change drivers.

- A