Usually when I spawn everything is ok, but once I move or fire this happens

Can anyone help me with this?
Things like grass and guns are all black
I have a 7600 GT nVidia
Thanks

Don't judge games by the color of their graphics! jk jk
i used to play games on PC and bad graphics meant one of 3 things
1. graphics card doesnt support that game
2. you were screwin around in the setting and messed it up
3. the graphics card broke when you dropped the computer lugging it up the steps

__________________
Ron Barrett had a brilliant idea, instead of putting a standard bullet in somones head and kill them, why not use a .50 caliber bullett and turn their face into lasagna?

Oh my God! Look! A flying bird!

Would you mind posting more of your system specs?
Without system information it's kind of like trying to diagnos an illness without knowing any symptoms.
This is likely a graphics card problem, either
a. This cards drivers are not up to date, or;
b. You've overclocked this card to the point of instability.
How much ram are you using, what OS, what cpu, motherboard, anything?
Also if you downloaded this game on an almost full hard drive you''re likely to run into problems. I strongly suggest keeping at least 15% of a hard drives total space free, and then defragment it.
But, if I had to guess (and I do because of lack of system specs) I'd say this is a shader issue caused by old drivers.