Dont worry I am in the same boat, I receive these errors when I am in the lobby for no reason.
If I get into a game usually I will receive a Microsoft Visual C++ error and the game crash's.
I have all the latest drivers for my system.
Running
Q9650 at 4ghz
GTX260
Soundblaster XFI Gaming
Windows Server 2008 x64
I just patched the game and will see If the problem persists