Originally Posted by
Stoo
A couple of solutions..
Either delete your game data (NOT save data) then re-download the update, or start a private match yourself and end it after a few minutes, should sort it.
Well it worked for me. Saw Coldo online earlier so he must have sussed it too?..
Yep got it working, had a look online on mw2 forums and got the solution, seems alot of people had the same problem.