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Windows 7: Upgrade Home Premium to Professional? (7)

17 Feb 2010   #1

Windows 7
Upgrade Home Premium to Professional? (7)

Hello everyone, I just received a copy of Windows 7 Professional via MSDNAA. I'd like to upgrade my computer which is running 7 Home Premium.

Is there any tweaks that I need to make, as every time I try to launch the Upgrade process via the downloaded Win7Pro disk, it tells me to use Anytime Upgrade. However, Anytime Upgrade says that it can't upgrade to that version of windows after I enter the key given to me by the MSDNAA (it validates fine).



(Copied from NBR)

My System SpecsSystem Spec

17 Feb 2010   #2
Microsoft MVP


Unfortunately, MS wants you to use Anytime to Upgrade between Windows 7 versions. You are left to clean install if you have another retail version.

However, there is a workaround which is achieved by adapting this popular fix for changing between the Ultimate RC and any other version: Upgrade the Windows 7 RC to any retail version Icrontic Tech

The same principle applies: you carefully change the reg keys to trick installer into thinking you are upgrading over the same version, which is a Repair Install in Windows 7 and therefore allowed.

It has worked every time tried so far, for many different combinations Starter>Premium, Ultimate>Pro, Premium>Ultimate, etc. All users report good performance.
My System SpecsSystem Spec
18 Feb 2010   #3

Windows 7

Thank you very much for this!
it worked very well, took awhile, but it worked. I remember doing this to update between beta and RC versions of Windows 7. I just didn't think to apply this solution to the issue I was having. Thanks again for it
My System SpecsSystem Spec

18 Feb 2010   #4
Microsoft MVP


You're welcome.

Glad it worked for you and thanks for reporting it back to us.
My System SpecsSystem Spec

 Upgrade Home Premium to Professional? (7)

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