I like to install apps into a virtual machine before actually installing it on my desktop. Imagine my happiness when I read through my license and found this.... USE WITH VIRTUALIZATION TECHNOLOGIES. You may use the software installed on the licensed device within a virtual (or otherwise emulated) hardware system on the licensed device. If you do so, you may not play or access content or use applications protected by any Microsoft digital, information or enterprise rights management technology or other Microsoft rights management services or use BitLocker. We advise against playing or accessing content or using applications protected by other digital, information or enterprise rights management technology or other rights management services or using full volume disk drive encryption. But even though it's supposed to be supported, I have run into only issues. Has anyone tried running Vista Ultimate within a virtual machine on desktop already activated for Vista Ultimate? Clearly the license says I can but it's not working out that way. I now have to call Microsoft whenever I need to reactivate my desktop (tendency of reinstalling everything every quarter) regardless of the fact that I have not changed any of my hardware since I first got my retail (not OEM) copy back in January. On top of that, when I now try to activate within VMWare it says the key is not genuine. It appears I'm unable to actually run both at the same time even though it clearly says that I can. Can anyone comment on this? I've had no luck with Microsoft support so far. No one knows the specifics about this. One genius thought I was talking about running Vista within a Mac OS