I might have made a mistake, in that I bought an Anytime Upgrade of Win7 Home Premium to Windows 7 Ultimate for a Windows 7 Pro computer. I have tried a few times inserting the supplied key, but errors pop up saying:

"The upgrade key is not valid. Please check the key and try again."

The computer is up to date. But I also know that MS has had problems in the past with the Anytime Upgrade and compatibility too.


  • ended up getting an open license upgrade from Win7 Pro to Win7 ENt... with software assurance (well work did). A bit pricey but I do get the free upgrade to Win8 when the time comes... keeping the Win7 Prem upgrade to Ultimate though... use it somewhere :) – Logman Aug 29 '12 at 2:45

You can not use a Anytime Windows Home Premium to Ultimate on a computer running Windows 7 Pro. It will not work. Depending upon where you bought it you may be able to return it:

  1. Refund
  2. Items ordered from Microsoft Store online
  3. Upgrade Paths

You cannot upgrade a Windows 7 Pro OS to Windows 7 Ultimate with a Windows Home Premium to Ultimate upgrade key.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.