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Windows 7: Downgrading from Windows 7 Ultimate to Professional

06 Jun 2015   #1

Windows 7 Ultimate
Downgrading from Windows 7 Ultimate to Professional

Hello everyone!

I want to downgrade my Windows 7 Ultimate installation to Windows 7 Professional, because of some licensing reasons.

I have tried the method of changing the Regedit values from "Ultimate" to "Professional" as stated here:

Unfortunately, when I try to do a repair install, I get the "Windows 7 Ultimate cannot be upgraded to Windows 7 Professional" error message.

Since I have fiddled around with that and not gotten any results, here is what I want to do:

-Backup all of my programs and Windows User Settings to an external hard drive
-Backup the entire current registry
-Clean install of windows 7 pro
-Restore the entire registry
-Restore my backups

My questions are:

1.) Is this feasible? Won't there be problems because I am importing a windows registry from my old windows account?
2.) Is there another way of doing the downgrade form Ultimate to Professional?

Thank you all very much in advance for your help, I really appreciate it

My System SpecsSystem Spec
06 Jun 2015   #2
Microsoft MVP


Are you using Professional Win7 installation media of the same bit-version? If needed ou can extract the ISO to unlock all versions using Step 1 of Clean Reinstall Windows 7. Then be sure to select Professional from the menu when you run the Repair Install

Did you follow exactly the registry changes in Change between Win7 versions workaround? I've never seen it not work.

You wouldn't be able to import the registry from Ultimate into Professional.
My System SpecsSystem Spec
06 Jun 2015   #3

Windows 7 Pro x64 Windows 10 Pro x64

Do you own an install dvd and do you have a Pro key ?

If you have an install disc you can create an all in one installer disc from it, with all versions of Windows 7 on it.

Windows 7 Universal Installation Disc - Create

Then you can clean install Windows 7 Pro :)
My System SpecsSystem Spec


 Downgrading from Windows 7 Ultimate to Professional

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