System HOSED exiting any Q3 engine game. Hardware or drivers to blame?

[BatmanNate]

I have this situation, where everytime I play a game based on the Quake 3 engine (with the exception of RTCW, leaving Q3, Alice, JK2, etc.) the whole system locks upon exiting the game. I am using the 21.88's under XP on a GeForce3 Ti200, and I've had no other problems with this setup. I tried more recent drivers, and more problems just developed. Does anyone have any idea what this is related to? Here are the involved specs:

Tyan Tiger MP w/ 2x XP 1500+ & 1GB ECC DDR
PNY GeForce3 Ti200
Soundblaster Live
Promise Supertrakk 6000 w/ 300 GB RAID 5+1 array
WinXP Pro
nVidia 21.88's
V-sync off

Has anyone else had this problem?