For some reason,when I play CSS my monitor goes black,then shuts off,leaving an anoying sound in the speakers.If I try to turn it on,It just shuts off again.The only way to fix it is to restart my comp.Ive run virus scans,and nothing.I think my drivers are crashing.Computer specs:

Video:Nivida Geforce 210
Processor:Intel [email protected] GHZ
Sound:Real tek HD audio.
OS;windows 7 home premium,64-bit.

It seems to ONLY happen when playing CSS.Any help?