A friend of mine just upgraded to XP. Each time he loads up the lastest drivers 22.50's. He system locks during Welcome splash screen. So after an fresh install he loaded up the 21.83's drivers. The system doesn't lock, but he can't run 3dBenchmark, or he can't play RTCW. In RTCW he can watch the intro movie, but when he goes plays the game is locks or kicks him back to the desktop. His system is 900 Mhz T-bird, SBLive, 256 pc133 ram.