must be a problem with the OS
Win7 and games don't actually do well with each other
i mean most of my games worked well in xp
but when I switched to win7, games would work for only about 10 minutes or so and then the computer would shut down without any error
I had used numerous drivers even modded ones for the graphic card but of no use
i suggest u switch to GOOD OL' XP
i'm sure it'll work fine!!!!!