I bought Win 7 Home Premium UPGRADE because I have Windows Vista. I tried to install Win 7 with Vista running under Parallels 7, but that failed. Then I tried installing Win 7 as a new VM under Parallels 7. That does not work because the new install of Win 7 does not see the Vista in the first VM. As a result Win 7 UPGRADE will not install. Does this mean that Win 7 can ONLY be installed under Parallels 7 if one is using the FULL version of Win 7 and not the UPGRADE ? Any way around this dilemma? I have a copy of Vista.