Microsoft Support - You have to read Vista News Discuss Microsoft Support - You have to read in the Windows Vista forums; http://www.overclockers.com/articles1416/ The guys claims honestly this is what MS support told him to do, when you could not Clean Install by Entering a "KEY" ...

[Snuffy]

http://www.overclockers.com/articles1416/

The guys claims honestly this is what MS support told him to do, when you could not Clean Install by Entering a "KEY" for his Upgrade Disk..
(Honestly I have the manual and MS tells you "NO KEY" is needed to install then to upgrade use the KEY..

[Znod]

Very good Snuffy. This is the issue I have been raising forever. What happens after one has upgraded from XP and then wants, or needs, to reinstall Vista cleanly? I am not surprised at the answer MS tech gave since MS apparently is not prepared to deal with the issue. And, this is the reason that I won't be upgrading any of my XP installations. I bought OEM Ultimate for my desktop. And, both TechNet and MS told me not to worry about continuing to use my TechNet Vista on my laptop (for the reason we are talking about) since I have an Express Upgrade to Vista and several legitimate XP disks/keys. All I can say is "good grief Charlie Brown."