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Windows 7: Problems Downgrading from Windows 7 Ultimate to Professional

22 Oct 2012   #1

Windows 7 Ultimate 64 bit
Problems Downgrading from Windows 7 Ultimate to Professional

Hey there I'm currently using Windows 7 Ultimate 64 bit and need to downgrade to Professional.

I've followed the guide that was on this forum as well as many other websites about changing the registry entries which I have done, however my upgrade has failed and given me this message when trying to complete the upgrade: Your current version of Windows is more recent than the version you are trying to upgrade to. Windows cannot complete the upgrade.

I'm assuming this is because the registry editing isn't enough to trick the installation into thinking it is Professional.

Does any one have a solution or has run into this problem before?


My System SpecsSystem Spec
22 Oct 2012   #2

Windows 7 Pro x64 Windows 10 Pro x64

Why ?

Just clean install professional.

Clean Install with a Upgrade Windows 7 Version
My System SpecsSystem Spec
22 Oct 2012   #3

Windows 10 Pro X64

It may be complaining about the service pack level and not the product itself. Does the Pro DVD have SP1 included? If not download a legal copy from here: Official Windows 7 SP1 ISO from Digital River My Digital Life
My System SpecsSystem Spec

22 Oct 2012   #4
Microsoft MVP


Always use the latest official installer after making sure Win7 has all of it's Updates completed, especially SP1.
My System SpecsSystem Spec
23 Oct 2012   #5

Windows 7 Ultimate 64 bit

Thanks guys, I did ask my Network admin for the SP1 ISO but I'll double check with him today. Else wise I should hopefully be able to use the ISO from that link with the companies volume user license, I'll report back later!
My System SpecsSystem Spec

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