In searching this forum I noticed that back on Parallels 3 a user asked whether Parallels could be used on a desktop and laptop in a single home by a single user. (Parallels to be used on only one computer at a time). The answer was that while it was legal to do so, there was no way, at that time, to go through the registration process with one activation key. Is that still the case or has that been fixed? I have the same situation.