I have a W7pro machine. Bought a W8.1 upgrade. (Yes, I have good reasons to do so, don't flame me on that one.)

Turned out it wouldn't keep my software installed. I didn't want to reinstall everything (a three day job), so I called MS, and after two hours of blundering finally they downgraded my W8.1 key to a W8 key, and I should install W8, which should let me keep my "apps" (software) installed, after which I can upgrade to 8.1.

HOWEVER: the 8.1 key is somewhere in my system, and I cannot download or install W8: it will always attempt to install 8.1.

I've tried: "Download windows 8" (below the "download Windows 8.1" button), downloaded it from the W8 sales link, downloaded W8 on a different computer and transferred the download... it doesn't matter. I cannot upgrade to 8, only to 8.1, I guess because the 8.1 key is stored somewhere. The reason I think so is because the upgrade process doesn't let me enter a key. (And after some trouble I get the oppurtunity to enter the key, it just says "invalid key" because it is trying to upgrade to 8.1 and W8 keys aren't valid).


Anyone any idea how to get the 8.1 upgrade key out of my W7 system?

  • 1
    You can use a Windows 8 generic key to install the product, then use a Windows 8.1 .iso to install Windows 8.1, then finally change the generic key to your Windows 8.1 license. This method is the only one I know will work.
    – Ramhound
    Nov 29, 2013 at 18:01
  • He can't even download Windows 8 though because the install program has already saved the fact that he was trying to install Windows 8.1
    – Mark Sowul
    Nov 29, 2013 at 18:24

2 Answers 2


Thanks everyone. I solved it myself by finding and removing the installation files. It is a while ago, so I am not 100% sure of which folders I removed. It is very hard to find when Googling :( . I think these are the folders I removed, though I repeat: I am not 100% sure.

Anyone with the same issues, try this:

Remove the folders


Of course, replace USERNAME with your user name.

Once I had the folders removed, installation went (almost) perfectly.


That you have transferred the download and still can't enter the key makes me think it could be something else.

If you can get to the key entry page again, try using the keys here: http://technet.microsoft.com/en-us/library/jj612867.aspx

Then when you do get to upgrade, you can go to System -> Change Product Key to put in your real one.

I had to do this to use the Windows 8.1 ISO to upgrade from 8 to 8.1. You can't use an 8.0 key to install 8.1, so I used the 8.1 key above, then when it finished I changed back to my legitimate 8.0 key.

Note also that I was getting "invalid key" with this, but I realized I had upgraded to Media Center, and so I needed to use the "Windows 8 Pro with Media Center" key and not merely the "Windows 8 Pro" key.

(It boggles my mind how user-unfriendly MS made almost every conceivable aspect of Windows 8).

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