I tried updating my game and now i keep getting this in the console and then it stops responding. I followed the instructions so I don't know what's wrong.

How did you update the game?

I had an older version of 4D1 so I downloaded the files in the tutorial and overwrote them in the mw2 folder. Am I supposed to get a fresh copy of the game and put them in?

Same problem here :S

Fixed.

I disabled my Sound and enabled it again, after that i restarted my computer and now it works fine.