Is it possible to activate Windows offline - meaning without booting into it? Lets say, I boot into Win7 on a physical disk, applied Win7 onto an attached VHD disk with Imagex, and want to activate it offline (not by phone, but possibly using DISM or similar tools to work with offline OS). For example, its possible to edit its Registry by loading its heaves into Regedit. Its also possible to add apps and drivers offline with DISM. So is it possible to activate it? Does any activation tool allow to select a particular drive with Windows install for activation?