So, I was playing Crysis 2 and my graphics card driver crashed. I restarted my computer and now when I alt tab out then back in, it stays at a black screen. If I hit Alt + Enter it freezes, same with changing any graphics settings. When it freezes I can move items on my Desktop as if the game isn't opened (and resize stuff etc)

Any help would be greatly appreciated.

If you're wondering computer specs:
W64Ultimate
2x GTX 580's
i7 930
6 gb dd3 1600 mhz
1200 watt psu

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