When I upgraded my friend's computer from Vista to 7, it told me to deauthorize their iPod before continuing. Think I could just deauthorize it after the installation, I ignored it and continued. Not knowing that the installation would take three hours, I didn't get a chance to do anything else as my friend was late for an appointment. Now my friend claims that iTunes won't update. They're coming up to visit me on Wednesday and they're bringing their computer so that I can look at it. What should I do about this dilemma? Is there a way to completely uninstall all traces of iTunes?