Weird slowdown?

Plz help me, my CF normally runns at 60-80 fps, but today, i turn on my pc, then when i start the game it's 1 fps, and making very strange sounds, like CD with cuts, but i was testing on Combat Arms the fps was normal, i think the problem is with the Crossfire, an this problem ocurred since NS patch, how can i fix it, i don't think the problem is my pc, thanks

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