Help D: !

I broke down and bought a copy and it's been great until now...
I restarted my pc and when i tried to play Mw2 i got this! D:
I have not reinstalled yet, but if there is a way around that it would be great.
[IMG]http://i5.photobucke*****m/albums/y189/Volvagia451/goddamnit.jpg[/IMG]

You have "Help" in the title, yet you don't even post in the help section. Damn Choob.

You have edited the textures or deleted one.

Open Steam
Go to the Games tab.
Right Click Modern Warfare 2 - Multiplayer.
Click Properties and go to the local files tab.
click "Verify integrity of game cache..."

It will check you MW2 files and automaticaly redownload the non-messed up files.
If that doesn't work just post here.