Graphics Problem! Help!

HeadTurtle

2 months ago, while i played Crossfire, after played for 10 minutes, suddenly my graphics moved very slow. Then, i exit the game, and load again, it's still happen. Then, i uninstall the games and reinstall it, it's happen again after play for 5 mins.
Then last week, i reinstall the games. And the problem still happens.
My graphics moving very slowly.
Is the problem happen by the games or my computer or my internet?
Can any1 help me to solve this problem? Or tell me what to do to fix this problem?
Thanks!
(sorry for my English)

[MOD]Rex

Have you updated your driver lately?