Call of Duty 2 PC problem?

What that sounds like is that either your boot file has been corrupted, or that your game is attempting to reinstall itself. Most games (nowadays) have a 'repair' function you can use when you load the cd. If this game has it, try it. If not, either uninstall and reinstall, or... ask your local computer geek. There's one in every neighborhood. Unless you live on the moon. :3