There are three possible solutions that now come to my mind:
1. Try to update tha latest video drivers from http://www.nvidia.com/object/winxp_163.71.html
If they are the latest, try to rollback to one of the previous, probably more stable version.
2. Open towsetup tool, switch off sound there.
3. Check your hardware. Some users reported, that changing cooler or memory card helped to solve the issue.
[ October 22, 2007, 09:52 PM: Message edited by: dmg ]