Deregistering a Windows 7 Home Premium Product Key

#1
I purchased a Win 7 Home Premium Upgrade and upgraded my computer from XP to Home Premium, but then I further upgraded my pc's to Window's Ultimate and have different product keys being used for these. I am wondering if I might be able to unregister/deregister my product key so I can sell this upgrade since I now have Windows Ultimate on my pc.
 


#2
I'd say it is not possible, at least not that I've heard of. You have bought the two upgrades to move from XP -> 7 HP -> 7 Ultimate, instead of paying the full price for the 7 Ultimate.
 


This website is not affiliated, owned, or endorsed by Microsoft Corporation. It is a member of the Microsoft Partner Program.