Mark, not all Vista builds RC/Beta support upgrade to the RTM version, but can't the problem here be that you are trying to downgrade from Windows Vista Ultimate edition to the Vista Enterprise edition, not moving from RC/Beta to RTM? I believe that it is valid to upgrade from Enterprise to Ultimate but not the other way around, regardless of problems with different builds etc. I actually think that you can "upgrade" most Vista editions to Ultimate, if you have Ultimate licenses of course :) Regards, Thorbjörn Sjövold Special Operations Software www.specopssoft.com <http://www.specopssoft.com/> thorbjorn.sjovold a t specopssoft.com Download our free tool for remote Gpupdate with graphical reporting, http://www.specopssoft.com/products/specopsgpupdate/ ________________________________ From: gptalk-bounce@xxxxxxxxxxxxx [mailto:gptalk-bounce@xxxxxxxxxxxxx] On Behalf Of Mills, Mark Sent: den 11 december 2006 23:54 To: gptalk@xxxxxxxxxxxxx Subject: [gptalk] Vista RC's and Betas used in GP test won't upgrade to Enterprise VLK For whatever it is worth to those who were testing GP with Vista: You cannot upgrade a Beta or RC to the Enterprise version. I used the Beta's and RC's when testing GP with Vista. However when I downloaded the full version along with my Volume License Key off the https://eopen.microsoft.com/EN/default.asp site, I received the following message when trying to change over to a Valid Enterprise License of Vista.