When i start mw3 my screen goes black. I can hear music and when i move my mouse i can hear the click sound of start game, options, quit, servers... I tried with my friends account and everything is good i can play without problems. It happens only with mine account. Please HELP!

Then... create a new account?

If you don't want a new name:

1. Login with your old account and click this: ucp.php?i=profile&mode=reg_details

2. Change your username to VirusWar_ or something like that and click on Submit.

3. Create a new account and name it VirusWar.

4. Start IW5M and login with your new account.