#7 – Problem with Windows Vista Enterprise upgrade to Windows 7 Ultimate RC

May 13, 2009 at 9:58 am 11 comments

After installing Windows 7 on several different ways (as only operating system on computer, dual boot with XP, within Virtual PC and Virtual Box) I wanted to how will upgrade from Windows Vista Enterprise Windows 7 Ultimate RC. So I started Virtual PC with my test installation of Vista Enterprise, mounted ISO image with Windows 7 installation and I started the upgrade process… And stopped… I got following message:

Windows Vista™ Enterprise cannot be upgraded to Windows 7 Ultimate. You can choose to install a new copy of Windows 7 Ultimate instead, but this is different from an upgrade, and does not keep your files, settings, and programs. You’ll need to reinstall any programs using the original installation discs or files. To save your files before installing Windows, back them up to an external location such as a CD, DVD, or external hard drive. To install a new copy of Windows 7 Ultimate, click the Back button in the upper left-hand corner, and select “Custom (advanced)”.

Vista Enterprise upgrade to Windows 7 Ultimate RC fails

It seems that Vista Enterprise can’t be upgraded to Windows 7 Ultimate RC. I’ll a make fresh install of Vista Ultimate in new virtual machine and then I’ll try to upgrade it to Windows 7 Ultimate RC.

// Updated on 3rd September: Take a look at post about upgrade paths from Windows Vista and Windows XP to Windows 7 //


Entry filed under: Microsoft, Software, Windows. Tags: , , , , .

#6 – Windows 7 Upgrade Advisor Beta, final system requirements for Windows 7 and Windows XP Mode #8 – Microsoft Office 2010 Technical Preview Registration

11 Comments Add your own

  • 1. Karan  |  May 13, 2009 at 9:36 pm

    You could always just upgrade your Vista Enterprise to Vista Ultimate and then do an upgrade to Win 7. That way you can test your work image and simulate what it might be like at RTM.

    Also, you might want to contact your account manager and see if there is a way of getting Win 7 Enterprise RC from MSFT. Though it’s not released to public, I’m sure they are testing this out with some of their top accounts – though you’ll likely need to be in some official beta program.

    • 2. itpendium  |  May 14, 2009 at 7:11 am

      When I try to upgrade Vista Enterprise to Vista Ultimate I get message that it can’t be done. I didn’t try to use workaround described on http://dltv.wordpress.com/2007/05/30/upgrading-windows-vista-enterprise-to-windows-vista-ultimate/.

      Thanks for advice regarding contacting my account manager but unfortunately I don’t fit into that group of MS users that have one.

      I did some more search on this topic and i came across this topic
      on TechNet web site ( http://social.technet.microsoft.com/Forums/en-US/w7itproinstall/thread/1931554f-e4c3-4c0d-93a5-c8af8d926d04/ ). It seem that Windows Enterprise edition is available only to invited clients. Who knows, maybe one day I’ll be one of those clients 🙂

  • 3. Brent  |  August 19, 2009 at 10:51 pm

    In case you are still trying to upgrade from Vista Enterprise to Win 7 Ultimate, I just did it with a simple work around.

    Before inserting the installation CD:

    Go into the registry (regedit) go to HKEY_Local_Machine->Software->Microsoft->Windows NT->Current Version

    Change EditionID from “Enterpise” to “Ultimate”
    Change ProductName from “Windows Vista Enterprise” to “Windows Vista Ultimate”

    Insert the windows 7 CD and follow the installation prompts. It should allow you to select the upgrade option now.

    • 4. itpendium  |  August 21, 2009 at 12:17 pm

      At the moment I’m running clean install of Windows 7. I’ve found this trick with registry but I didn’t try it by myself.

    • 5. John  |  September 29, 2009 at 4:57 pm

      Brent, can you update? I’m in the same situation – I have Vista Enterprise installed and I want to upgrade to Win7 Ultimate.

      Did this trick work smoothly? Any issues with Win7 updates?

  • […] 3, 2009 One of the most popular articles on this web site is “Problem with Windows Vista Enterprise upgrade to Windows 7 Ultimate RC“. Windows 7 beta and RC where available only in Ultimate version and that was the reason why […]

  • 7. Ibrahim  |  October 16, 2009 at 6:24 pm

    Windows Vista™ Ultimate cannot be upgraded to Windows 7 Enterprise.

  • 8. B  |  December 3, 2009 at 6:32 pm

    Windows Vista Ultimate CAN be upgraded to Windows 7 Enterprise.

    Just use the registry edit trick mentioned above to change the mention of Ultimate to Enterprise. Then use the Windows 7 Enterprise CD to upgrade.

  • 9. B  |  December 3, 2009 at 6:33 pm

    I meant DVD not CD in my previous comment.

  • 10. John  |  December 4, 2009 at 4:21 pm

    Agreed, I used the registry edit trick and upgraded vista ultimate to windows 7 enterprise without a problem.
    I’ve been running it for over a month now and it is stable.

  • 11. Milind  |  December 10, 2009 at 12:54 am

    Thanks Brent… it wirks for me… I just changed the registry name to Ultimate and I was able to update my vista to win 7…!!!


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