I'd like to remark about the ctd's mentioned in this thread: Most of those are probably actually Windows 7 errors and can sometimes be recognized by "The Graphics Driver has stopped working and was restarted".
I have this error sometimes 3 to 4 times shortly after starting CoD, forcing me each time to restart the game, when i start it then again, i can play for hours.
The same happens with ArmA 2, but not that often and not that regularily.
__________________
Win 7/64 Ult.; Phenom II X6 1100T; ASUS Crosshair IV; 16 GB DDR3/1600 Corsair; ASUS EAH6950/2GB; Logitech G940 & the usual suspects

|