This is so frustrating it's been going on for about a week and I can't figure it out. Here's my computer: Athlon XP 2500+ barton, ASUS a7nx8 deluxe, 1gb ddr 400 ram, geforce 4 ti 4200, with win xp home. Whenever I play a newer game (so far it's happened with Prince of Persia:Sands of Time, and Horizons) after a random amount of time anywhere from 1 second to 2 hours, the game will crash to a strange looking blue and white checkered screen. I have to do a manual restart after this. I searched for this on google but only found one obscure post that didn't help. When I check the WinXP error log, there are no errors related to this. I tried tweaking every single graphics settings in these games with no luck. I think both of these games are DX9. When i play Counter-Strike tne crash never happens. I had all the updated graphics drivers and everthing, and all the Win XP critical updates. I thought it might be memory errors as i just recently got a new 512 mb stick, but I've tried both my sticks individually and I've tried some of my friend's sticks. Finally I blitzed my entire hard drive thinking that would solve everything. But alas I reinstall winXP and just those 2 games, with the updated graphics drivers and the critical updates, and bam, the error happens in like 5 seconds, with nothing in the error log. Ugh, any one have any ideas?