My Cross Fire Crashes right before I shoot someone.

I load crossfire just fine, the first game I join works just fine, but after the first game and I start a new game it freezes. It freezes either right before I shoot someone, or I'm spectating and the player shoots someone. It's been like this for 3-4 days now and it's getting pretty annoying. I have redownloaded crossfire already, and I open cross fire as an administrator every time. Is is Crossfires fault or my own computers? (FPS 215) (Ping 73)