I dont know what it is but every time i try to play UT it locks up after just a few seconds of play. It locked up in the retail version and 436. I have an updated system (1.2ghz athlon, geforce 2, ATA 100, amd 760, soundblaster live), with all the most recently updated drivers and patches (det 3 and direct x8) its really starting to piss me off since i just formatted and its locking up again! 3d mark 2001 ran fine last night after the reformatting but this morning it also locked up. Im at a loss for what to do, hopefully some of you UT vets can provide some advice, it would be greatly appreciated! thanks!