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Windows 7: Upgrade Home Premium to Enterprise

25 Jun 2010   #11

Windows 7 Ultimate x64 (Retail)

This has nothing to do with the Enterprise issue but just wanted to note that I was able to use a retail key from my Technet subscription to anytime upgrade a laptop that had Home Premium on it to Ultimate. Took about 5 minutes. So for me a regular Ultimate retail key worked (like a charm) for doing an anytime upgrade.

My System SpecsSystem Spec
25 Jun 2010   #12

Windows 7 Ultimate x64, Mint 9

I would highly recommend wiping the laptops (gets off all that crapware) and just install Enterprise. Do this once, make a system image, use it on all the laptops. I am sure you know how to deploy

My System SpecsSystem Spec
05 Jul 2010   #13
mickey megabyte

ultimate 64 sp1

i've just tried to upgrade my home premium x64 to ultimate x64 by using a key from my new technet account.

unlike harpa above, it didn't work for me.

well, it was about time for a reformat anyways...

Attached Images
Upgrade Home Premium to Enterprise-nocando.png 
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05 Jul 2010   #14

Microsoft Community Contributor Award Recipient


Try Retyping your key code.

Using TechNet below.

Upgrade Home Premium to Enterprise-capture9.png

My System SpecsSystem Spec
05 Jul 2010   #15
mickey megabyte

ultimate 64 sp1

just tried it again with two other keys, same result

i get the same screens as you, it seems to have no trouble verifying the key, it tells me it will take 'as few as 10 minutes' to install, and my computer will restart automatically.

i press the upgrade button, it starts upgrade, and after about a minute i get error message.

i'm not too bothered, as i have been thinking for a few weeks about reformatting anyway. i'm just a little perplexed as to why the key gets verified successfully, but will not perfom the upgrade.

(naturally my current installation of home premium is 100% legit, preordered back in october.)

i dunno - i just hope the keys work when i reinstall!
My System SpecsSystem Spec
05 Jul 2010   #16


You can change Premium to Ultimate using the popular workaround many used to change the RC to any paid retail version: Upgrade the Windows 7 RC to any retail version Icrontic Tech

In your case you would only need to change the two registry keys shown to ULTIMATE and Windows 7 ULTIMATE which will trick the installer into thinking it is doing a same-version Repair Install which is always allowed:

Upgrade Home Premium to Enterprise-regkeys.png

In helping people do this after release I always asked that they let us know how the Upgrade compared to a clean install when they got around to doing one. Everyone seemed satisfied with the Upgrade - and that was for the RC which wasn't supposed to be upgradable! So it should be worth a shot.

My System SpecsSystem Spec
05 Jul 2010   #17
mickey megabyte

ultimate 64 sp1

great advice - thanks a lot greg

i'll give it a try later, bit busy installing home server at the moment...

My System SpecsSystem Spec
05 Jul 2010   #18


Glad to help a Megabyte Guru and thanks!
My System SpecsSystem Spec
05 Jul 2010   #19
mickey megabyte

ultimate 64 sp1

hah - i'm not really a guru, it's all bluff and knowing how to use a certain flowchart...
My System SpecsSystem Spec
05 Jul 2010   #20


I'm really an 80 year old lady in a nursing home in Rapid City.

THey're comin with my meds so I gotta go back to Scrabble.
My System SpecsSystem Spec

 Upgrade Home Premium to Enterprise

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