I have some questions regarding Windows 8. 1) I am already using a Windows 8 Preview edition that I got with Parallels. If I download (buy) just the upgrade, will it work? 2) Will I be able to save a backup of Windows 8? Or only a backup of the upgrade? 3) What if I have for some reason to delete this Virtual Machine, will I be stuck with an useless upgrade? I absolutely hate Microsoft.