I use Parallels 3.0 with my Boot Camp 1.3 partition, running a purchased copy of Windows XP Home SP2 (OEM) with all updates. Back when I first started using Parallels with this partition (an early beta before 2.5) I had to re-activate Windows every time I switched between Boot Camp and Parallels. The Parallels team fixed that glitch, presumably by making their virtual hardware report a closer match to the real hardware reported by Boot Camp, and since then I have gone back and forth many times between Parallels and Boot Camp without needing re-activation. I recently installed Office 2007 Enterprise and Visio 2007 under Boot Camp. I was not surprised to have to re-activate Office and Visio when I next used Parallels. I WAS surprised to discover that when I went back to Boot Camp I was asked to re-activate again. It looks as if I will be asked for activation every time I switch between Parallels and Boot Camp. Obviously the re-activation rules for Office 2007 (and likely for Vista) are more strict than for XP, and Parallels does not have a fix in place so far. This Office installation is from a big developer software bundle (with a lot of server software, not just Office) that includes product keys good for client installation on 10 computers. I have a horrible suspicion that each time I re-activate, I am using up one of those 10 permitted installations. I tried to find out from Microsoft, but the people who handle routine telephone activation had no idea, and the other Microsoft group where they forwarded my call were not willing to talk to me unless I paid them $49 by credit card. That did not seem like a good investment since they did not seem to really understand what I was talking about. What experience have other people had with activation of Vista and/or Office 2007 in a Boot Camp partition? Do you have to constantly re-activate? Any suggestions at all? For now I am simply not using Office or Visio in Boot Camp.