Change Windows 7 Ultimate to Windows 7 Enterprise

It is actually not that difficult to flip from Windows 7 Ultimate Machine or VM to Windows 7 Enterprise (you just need to modify the registry keys to reflect it), and then use the Windows 7 Enterprise DVD to run an upgrade.

First you should of course backup your data.

Here is a quick hack to make the Windows 7 installer DVD think you have Windows 7 Enterprise already.

  1. Open regedit (Start -> Run -> regedit )
  2. Locate HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\Current Version
  3. Edit two keys to say ProductName and EditionID to say “Enterprise” instead of “Ultimate” respectively.
  4. You should now see Enterprise and Windows 7 Enterprise as values on this page.
  5. Insert your Windows 7 Enterprise DVD and run an Upgrade install.
  6. Open a Command Prompt and Run “C:\Windows\system32\slmgr.vbs -ckms” to clear any KMS servers
  7. Optionally clear your product keys with “slmgr -cpks”
  8. Run “C:\Windows\system32\slmgr.vbs -ato” to register with your Enterprise Activation server
6 Responses to “Change Windows 7 Ultimate to Windows 7 Enterprise”
  1. Brent 17 March 2012 at 4:59 pm #

    Does this upgrade work to go from Windows 7 Pro to Windows 7 Enterprise?

  2. Tim P 10 July 2014 at 6:31 pm #

    This process just worked for me

    I followed steps
    A,B,C,D,E (from within Windows, not boot), F once process had finished, step G didn’t work, and I didn’t run H because I didn’t have an Enterprise Activation server, I just “change product key” from within the System control panel.

    Thanks for the clear, basic steps!

  3. Tim P 10 July 2014 at 6:31 pm #

    I should also mention that this was to upgrade Windows 7 Pro to Enterprise so we could use Japanese language at work.

  4. George 2 February 2015 at 9:28 am #

    Hello All, I have a bit of a situation. I have a computer with win7 enterprise that is no longer supported by my IT dept. Of course I am getting the error message that this is an unregistered version etc. I would like to migrate to ultimate. How can I accomplish this without losing everything’s? Thank

  5. jack 26 April 2015 at 1:23 pm #

    Amazing, THX a LOT!!!!!!! Helped me a lot!

  6. Howard Lefkowitz 23 August 2015 at 10:22 am #

    I would also like to change4 a win 7 enterprise to a win 7 ultimate. I have disks and registration for both. It is a 64-bit system. Is this possible?

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