BF3 was working fine till 2 days back with win7 32bit. But I just installed Windows 7 64bit. Now im facing BSOD. I just installed a new Windows 7 64bit with ATI 12.1 Drivers. Im using ATI 4850 to play Battlefield 3 on my PC. But after 10mins game just FREEZES with a SOUND BRRRR and PC...