How do I best upgrade Windows 7 Home Premium to Windows 7 Ultimate?

Thomas Allen May 29, 2010

My new computer came with Windows 7 Home Premium. I’ve subsequently (and legally) acquired the Windows 7 Ultimate 64-bit x64 upgrade, which requires a pre-existing OS license, which I have.

What can you suggest would be the easiest route to “upgrading” my current installation to the Ultimate version?

  1. Tina
    May 30, 2010 at 12:35 am

    Thomas,is your Windows 7 Home Premium 32-bit or 64-bit?If it's 64-bit, you will be able to upgrade instantly through Windows Anytime Upgrade, which comes with any Windows 7 version. All you need to do is enter the Windows 7 Ultimate product key.If your Home Premium is 32-bit, however, you must perform a clean install to upgrade to a 64-bit Ultimate.Hope this answers your question.Here are a few MakeUseOf articles you may find interesting:

    • Thomas Allen
      May 31, 2010 at 9:19 pm

      Tina, thanks for your input. The OSes are both 64-bit versions. I have a concern though: Will this tie BOTH of my versions to the first machine I put them on, obviating the possibility of having two legal copies, each with its own product code?


      • Tina
        June 1, 2010 at 8:25 pm


        if you purchased both versions of Windows 7 individually, you can use them on two different computers. Technically, you are replacing your Home Premium with Ultimate. So you are no longer using Home Premium on that computer and can instead use it on one other computer.

        You will find all the License Terms for Microsoft software here: [Broken Link Removed]

        • Oron
          July 28, 2010 at 3:38 pm

          While you are technically right Tina, I suspect that if you use the 'upgraded anytime' option this will disable the lesser system (=Home Premium) as Windows will deal with it as an upgrade rather than replacement.

          In other words, I think you Thomas will lose his Home Premium licence if he upgrades his system.