I have the latest PC(2.66 intel core 2 duo)
512+ mb graphic card!!

I just bought GRAW and its installed well!!
I really really played it a lot!!
Everything was fine until I reached check point 4 of level three(VIP is down)
I am facing graphic blackouts!!its like, every object is compelety turning black with white out lines. its not like whole arena goes black!!when i nabvigate my mouse to other side its again normal! every thing randomly turns black while i navigate my mouse!!its really difficult to play like that!!!plzzzz help

please help on thissss!!plzzzzz
its really disgusting!!