Windows 8 and 8.1 Forums


How to Install purchased Windows 8.1 over 8.1 Pro Preview

  1. #1


    Pacific Northwest - USA
    Posts : 5
    Windows 7 64 bit / Windows 8 64 bit

    How to Install purchased Windows 8.1 over 8.1 Pro Preview


    I'm running an unvalidated copy of Windows 8.1 Pro Preview

    1) If I purchase Windows 8.1 will it install over the 8.1 Pro Preview
    or
    2) Can I install Windows 7 over the 8.1 Pro Preview

    I installed the 8.1 Pro Preview over Windows 7 from an ISO disk , thinking it was the full version I had purchased by download from Microsoft - Thank you for your help, IM

      My System SpecsSystem Spec

  2. #2


    You should be able to just change the product key using the key from the Pro version you purchased. No reinstall should be required.Right click on This PC then select Change product key at lower left.
      My System SpecsSystem Spec

  3. #3


    Pacific Northwest - USA
    Posts : 5
    Windows 7 64 bit / Windows 8 64 bit


    Thank you Ztruker! I no longer have the purchased download or it's keycode. I actually found the keycode just now that belongs to the pro Preview, doesn't work? "Windows can't activate right now. Try....later.....

    I don't mind paying and downloading 8.1 from Microsoft. Do you think it would install over the preview? I'm not getting a Windows 10 invitation on this PC.
    Last edited by Imageman; 27 Jun 2015 at 22:37.
      My System SpecsSystem Spec

  4. #4


    Sydney, Nova Scotia, Canada
    Posts : 6,490
    Windows 10 Education 64 Bit


    Create installation media for Windows 8.1 - Windows Help Should work with your pro key if its an authentic key.
      My System SpecsSystem Spec

  5. #5


    I actually found the keycode just now that belongs to the pro Preview
    So it won't work with a legit downloaded ISO either.

    I don't believe 8.1 will install over Pro Preview. You will have to save your data, do a clean install t hen restore your data.it

    You could contact Microsoft and see if they can help replace the Windows 7 download and key you purchased before. Save you $199.
      My System SpecsSystem Spec

How to Install purchased Windows 8.1 over 8.1 Pro Preview
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