Well that was never a problem for me, but since I tweaked around a little and realized that it was a pain to set the screen to 1024 resolution to play I did a little mathematic calculation and made a big "duh" as I smacked my head to the wall. The working setting was 1280x1024 not 1280x960 as the game supports. And after correcting this and closeing my AV program I had a run for 8 hours straight without and problems. Also to quicksave alot seems to make the game more stable.. :S might just be superstition but well, it works!