Call of Duty 5 i bought from my friend for 40 bucks along with Call of Duty 4. Cheap right? Haha. Anyways, they came with a video card he had bought and he didn't want them so he sold them to me, they're unopened, brand new. I installed them, Call of Duty 4 works perfectly fine. Sometimes on multiplayer i get an unknown windows function or whatever, but everyone has that.. call of duty 5 won't even run. i click it to run and it just gives me a "Call of Duty 5 World at War has stopped working..Windows is checking for a solution to this problem" error box. wtf. i'm downloading the patch real quick- is that going to solve the problem? I tried playing multiplayer and i atleast got it to open up but it said i needed to patch to join any multiplayer games..any advice would be great. I already have the sound fix, 24 bit 48000 ghz.