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Windows 7: Upgrade from 7 Pro to 7 Enterprise

31 Oct 2011   #1

Windows 7 Enterprise 32bit
Upgrade from 7 Pro to 7 Enterprise


im interested to know if it is possible to upgrade from Windows 7 Professional to Windows 7 Enterprise?

I work in a bank as an IT Pro, so it is my job to do this upgrade. I have more than 400 computers that have 7 Professional installed and need to be upgraded to Windows 7 Enterprise.

I have done some research and so far i found out that its not possible to do so.

Thanks in advance.

My System SpecsSystem Spec

31 Oct 2011   #2

Microsoft Community Contributor Award Recipient

Windows 7 SP1, Home Premium, 64-bit

It's no-can-do if you choose to believe this, at least for "Anytime Upgrade":

Windows 7 Upgrade Paths
My System SpecsSystem Spec
31 Oct 2011   #3

Windows 7 Ultimate x64

First you have a have a volume license agreement with Microsoft to get licensing for Windows 7 Enterprise? Do you have a volume license or enterprise agreement with Microsoft?

I'm guessing you want to move from Professional to Enterprise to get BitLocker support?
My System SpecsSystem Spec

31 Oct 2011   #4
Microsoft MVP


There is a workaround to change between versions which has been used successfully here for years now, including by tons of beta testers changing to their paid version of Windows 7. It tricks the installer into thinking it's doing a same-version Repair Install which is always allowed, since no other in-place Upgrade path is available for Windows 7.

However this has never been tried that I know of to Enterprise which has its own licensing scheme. I doubt licensing comes to bear while changing the OS over, however, but would be done later with the new method.

You could experiment with a single unit to see if it will work then write a script or SysPrep to mass deploy, since your only other option is apparently to clean reinstall all 400 computers.

The important thing to remember when mulling this is that a Repair Install completely reinstalls the OS so there is no trace of the old OS left, but leaves your files, programs and settings in place. You'd need to closely examine whether settings provide a corruption path or some sort.
My System SpecsSystem Spec
24 Jan 2012   #5

Windows 7 Professional x64

Hi everyone. I'm working on behalf of a government agency (local government nothing crazy) and we are in the midst of migrating to Windows 7 from Windows XP. We've got all that handled but the biggest problem we have is the machines that we've been rolling out for the last year or so have Windows 7 Pro x64 and need to be converted to Enterprise x64. We're already on a Volume License with a KMS in place with 7 Pro so what exactly is the issue with converting Pro to Enterprise?? There HAS to be some way to script it or upgrade it without having to re-install the entire OS. It would just be a pain in the rear to have to migrate all 500+ PC's for something as simple as a version change. Does anyone here have the "technical" reasons why it doesn't work? I've got plenty of test machines to do this on and get this figured out. I'm determined to make this work but I need some help. Where should I start? Any help would be greatly appreciated. Thanks!!!
My System SpecsSystem Spec
24 Jan 2012   #6
Microsoft MVP


You can test it as suggested in my last post. Set a System Restore Point - Create and make a Win backup image so you can start over if necessary. Backup Complete Computer - Create an Image Backup

The workaround involves changing the two registry keys exactly as shown below then running a Repair Install with the SP1 installer which changes versions as it in-place upgrades Windows 7:

Upgrade from 7 Pro to 7 Enterprise-regedit.pngclick to enlarge

No guarantees since Enterprise is a different animal from normal retail Windows 7, however since you have the same type VLK keys which are used for Enterprise if it works it may Activate. There have never been any complaints about the performance after using this workaround which has been used countless times since Windows 7 release to change between version, including from beta.

Let us know how it goes.

My System SpecsSystem Spec
29 Nov 2013   #7

Windows 7/8/8.1 x64 &&& Debian-Based Linux

Apologies for reviving such an old thread, but the OP never posted back with his results. I would like to post mine if that's alright (:

Going from an OEM installation of 8.1 Core, tweaking the registry settings suggested by gregrocker, I was able to use 8.1 Enterprise VL media to perform a repair installation and preserve all the user files, OEM software, drivers, etc. Windows is now activated with VL key just fine.

I hope this will serve as a helpful reference for anyone who needs to accomplish this. I have been having all kinds of issues getting sensors and features (auto-rotate and WiDi) to work after a reinstall on all sorts of devices, and I am of the belief that many OEM installations are tweaked in such a way that an end user would not be able to replicate the changes needed to get things functional again. This has solved many of my problems in that arena, so thanks be to you, gregrocker!

As for the repair installation, you can refer to brink's walkthrough here:
Repair Install Windows 8
My System SpecsSystem Spec
29 Nov 2013   #8
Microsoft MVP


Thanks for reporting back your results, since we still had not heard whether Enterprise can be version-switched with the Repair Install workaround many used from beta.
My System SpecsSystem Spec

 Upgrade from 7 Pro to 7 Enterprise

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