Hi, I am trying to install XP-mode on Windows 7 Ultimate. I use this link: "microsoft.com/windows/virtual-pc/download.aspx" When I try to download it, it says "windows validation required". Then it makes me download "windowsactivationupdate.exe". I did this and installed it, but then nothing happens. When I press "continue" the same popup comes telling me to download "windowsactivationupdate.exe", which I just did. NOTE: At the bottom on "computer" properties it says "windows is Activated". Can anyone unconfusify me please?