I've installed assassin's creed 2 but it wasn't compled so I've deleted it and then I want to reinstall it. But when I am reinstalling it is giving me a message. Assassin's Creed 2 already installed Assassin's Creed 2 is already installed on your system. Please run uninstall script and launch installer again to reinstall the game.". I don't know what I must do. PLease HELP!!!