I have a macbook pro I have parrells running with Vista.I also have bootcamp on my computer because some things I can't run in vista on parrells.I like to have bootcamp because I can switch back and forth really easy so I have both on my computer running windows vista ultimate.When I boot up I just push the alt key and can pic windows or mac.I have all of a sudden got a message telling me to get a key for windows because one is already running.Aren't I aloud to put it on my computer twice?Can someone explain this to me thanks.