SF4 stop working while battle


#1

Until now it worked fine!
Sometimes while battle the game stop working and display many colors and then i have to restart my computer.
I dont know what to do, i have tournament battle to do soon =[

i have windows 7.


#2

The many colours thing sounds like a video-card problem (overheating).
Is there any other video-game that is video-card intensive that you can test it with?