ProductName "Windows 7 Ultimate" changed to "Windows 7 HomePremium"įor reference, I also used the following posting on tomshardware (), specially the response by aquasystems. HKLM\Software\Microsot\Windows NT\CurrentVersionĮditionID "Ultimate" changed to "HomePremium"
I did however used it this way (notice upper & lower case matching the "Ultimate" entry format): I figured I was better off hacking the puter manually myself. I used a registry solution explained in several of the links I've included, but I made the changes manually and without the use of a popular tool from a website called deviantart. So my "downgrade ultimate to home premium" search brought me here, amongst other places. But now that I bought a refurb desktop with no OS (with a COA for "Windows Vista Business OEMAc") I needed to use that Ultimate license on the "new" refurb desktop. I had "Windows 7 Home Prem OA HP" on a HP desktop I bought new and then upgraded the system to Ultimate with an Upgrade key.