This post is for those who are wondering “How to Upgrade Windows Vista Enterprise to Windows Vista Ultimate”
Updating Vista Enterprise to Ultimate was a pretty easy task. If you were like me and tested out the Enterprise edition for a while and then later found yourself purchasing the Ultimate copy of Windows Vista you would be unhappy to know that by default you can not update from the Enterprise Edition. This proposed a dilemma for me because i purchased a copy of Ultimate and was wanting to install it. Upon A simple registry hack I was able to update my copy to a fully registered copy of Windows Ultimate.
How to upgrade Enterprise to Ultimate:
How to upgrade Enterprise to Ultimate:
Here is a way to upgrade Windows Vista Enterprise to Ultimate (not enabled by default)
Before inserting the Windows Vista Ultimate CD
Go to, Start, Run: and type: regedit.exe
Go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion
Change the key : ProductName from “Windows Vista ™ Enterprise” to “Windows Vista ™ Business”
Change the key: EditionID from “Enterprise” to “Business”
What this basically does it for the brief moment that your install DVD attempts to know what copy of Vista you are currently running it will be fooled into thinking you are running a Business Edition which is perfectly able to be updated.
Do not restart
Now insert Windows Vista Ultimate CD and start upgrading (the option Upgrade will not be graded out anymore)
