All opengl games freeze up. HELP!

I’m having some major problems with all my openGL games (Quake 2/3, UT, Earth 2150 Demo, Half-life) they all freeze up. I have no idea what to do. I have changed drivers about 10 times. Still hangs. I have a P3 500, 128MB RAM, Viper 770, SB Live!, Asus 440 BX motherboard. If anyone knows what is happening please give me a hand. All my problems started when I installed Quake 3 for the first time. It’s to the point that non of my games run now, they usedd to run for a while then freeze. My Video card is not overheating and my drivers are all up to date.
Thanks for any help.

Check out the message that I posted last week. I am having the same stupid problem.