Hi, I've just finished installing Parallels Desktop 5 on my Mac Pro machine (8 cores and 32 GB RAM) in hope to use my legal Windows 7 (64 bit) previously installed via BootCamp. After installing Paralles Desktop and running my BootCamp Windows, I was asked to reactivate my Windows product key. However, when I do so, I get a denial message saying "The product key must be activated with new hardware Windows detected a change in hardware or hardware driver. Validation requires that the hardware and Windows product key match what has been registered. To change the hardware your Windows product key is registered to use the automated phone system to activate." I should mention that the Parallel Tools in properly installed in my Virtual machine. Does anybody know how I can solve this problem. Your comments are greatly appreciated.