I am about at my wits end with Unreal Tounament locking up(Quake3 also at times). I can run it in software mode . But it looks terrible.When I play with the D3 drivers from Nvidia. I get lockups at random(1min to 1hour)and I have to hit the reset button. Ctrl etc.. doesn't work. A sound loop will be there as the screen freezes.
I have re-installed new drivers for everything. I have disabled many settings and changed them back because the lock up was still there. Any ideas or suggestions appreciated.
Cold Steel

1 GHz AMD Athlon T-Bird
Asus V7700 GeForce 2 32MB
GTS Deluxe
CreativeLabs X-Gamer Live
Windows ME
256MB Crucial SDRAM pc100
16X Creative Labs CD-Rom
4x4x16 Yamaha CD Burner
AST 7L Monitor
WD 45 gig 5400rpm
Antec case w 300watt PS
Supra Express 56K ISA