I used 'Migration Assistant' to move from an old iMac to a new Mac Pro. This moved the Parallels environment as well. I purchased the two additional licenses for Parallels and installed it on the new computer. When I fired it up, the Windows environment, files, etc. were exactly the way they were on the old computer (this is a good thing). The one exception was Windows detected the hardware change and said I need to re-register... i didn't do this since I bought another copy of Windows for the new computer. Here's the question... I would like to re-install Windows on the new machine, but keep the Windows environment (files, desktop, etc.) that I had. I wasn't sure if, during the re-registration process, I could simply provide my new S/N, or if I needed to do a fresh install from the new Windows disk. If the later, how do I keep the current Windows environment?