make sure you have the latest driver for your video card. also for testing purposes you can try using a single video card to see if the problem persists.
I just downloaded mw3 for the free weekend and everytime I start it my computer either bsod's or just restarts. I undid all of my overclocks and still get the same problem. Ive also tried reinstallind direct x...
Asus m4a89gtd pro/usb3 AM3 mobo
8gb ddr3 ram
OCZ ZX 850w gold
The game is installed on a Harddrive but my boot drive is an ssd.
BFBC2, metro 2033, cod4, and mw2 all work fine even at the same time but mw3 is causing issues.