I am running Mac OS X Leopard. I am using a Windows XP Professional guest. I just started using a new virtual machine. I used Converter to get the image off an existing computer and tried to get it on Fusion. (This isn't the first virtual machine I've done, it's worked in the past.) Now, usually it bugs me to register XP in the beginning and then I just punch in the XP product key. But this time it says "This computer is already registered" and logs me off. What should I do?