I have a valid and legitimate version of Windows 7 Professional which I own. Before Parallels 5 came out, I installed my copy of Windows 7 on my Mac using VMWare 3.0. I activated Windows 7 on VMWare 3.0. I then downloaded Parallels 5.0 and transported my VMWare Windows 7 Drive to Parallels Drive. Now Windows is telling me my Parallels copy is not a legit copy and I must put in a new Product ID Code. Is there any way to use my existing product ID code on the Parallels drive without buying a new copy of Windows 7 Professional?