Have you tried "verify integrity of game files" ?
You have injected something ?
I had the same problem on MW2, try to inject one you’re ingame or use manual map
I made a video but i can't upload it for the moment ....
So i took a screen (sorry no link, i'm not allowed) :
hostingpics.net/viewer.php?id=151692Capture.png
Then the game crash
And this is Aesir's Folder :
hpics.li/5796200
Only infected works, maybe because i was playing it when he crashed my game ?
Any serius Hackker that wants to help/work with me,, contact me
lokking for a hackker
contact me on skype:
itali_53hotmail.com
I don't think any cheater did this. Have you tried reinstalling your game?