Windows 8 and 8.1 Forums


How to reinstall Windows 8 after a previous upgrade?

  1. #1


    Portland, OR
    Posts : 68
    Windows 8.1 Pro

    How to reinstall Windows 8 after a previous upgrade?


    I build my own desktop. I first had Windows Vista on it, which I bought on a DVD. I then skipped Windows 7 completely, but later upgraded to Windows 8 when Microsoft had a promotional period for it early in 2012 when it just came out.
    Now I'm replacing the motherboard and also swapping the HDD to SSD, and I'm curious. Can I still install Windows 8 as an upgrade like I did before? And if yes, then how?
    PS. Technically I'm using it on the same computer.

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  2. #2
      My System SpecsSystem Spec

  3. #3


    Posts : 56
    Windows 8.1 Pro x64 (6.3.9600)


    If you have obtained Windows 8 via upgrade, it shouldn't be a problem.

    Either way, you should have a serial number for Windows 8, an installation medium (DVD, USB) and that should be enough. You can always call Microsoft if internet activation fails.

    If you don't have an installation key or a DVD please tell us more about how you got the update.
      My System SpecsSystem Spec

  4. #4


    Portland, OR
    Posts : 68
    Windows 8.1 Pro


    Very nice. Thank you! I'll try it.
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  5. #5


    Portland, OR
    Posts : 68
    Windows 8.1 Pro


    Quote Originally Posted by Giga Hawk View Post
    If you have obtained Windows 8 via upgrade, it shouldn't be a problem.

    Either way, you should have a serial number for Windows 8, an installation medium (DVD, USB) and that should be enough. You can always call Microsoft if internet activation fails.

    If you don't have an installation key or a DVD please tell us more about how you got the update.
    I got it from a torrent site ...
    kidding.

    I think it was in Jan. of 2012 when Windows 8 just came out and everyone was bashing it Microsoft had a promo deal that anyone could upgrade to Windows 8 from any previous version for something like $40. I jumped on the wagon and upgraded my Vista, since it was such a good deal.

    So I do have an old Vista DVD but do not have Windows 8 upgrade DVD because I think I had to download it, or maybe it came via email. Can't remember now.

    So I searched my email and found the product key for Windows 8 upgrade. Is it all that it needs? So the process is pretty much like what Ztruker pointed to, right?
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  6. #6


    Posts : 56
    Windows 8.1 Pro x64 (6.3.9600)


    Yes, basically the next step would be getting a "Windows 8 Upgrade ISO online from Microsoft" I sure hope you don't have to install Vista for that :-)
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  7. #7


    Portland, OR
    Posts : 68
    Windows 8.1 Pro


    Quote Originally Posted by Giga Hawk View Post
    Yes, basically the next step would be getting a "Windows 8 Upgrade ISO online from Microsoft" I sure hope you don't have to install Vista for that :-)
    Haha. We'll see...
      My System SpecsSystem Spec

  8. #8


    Posts : 5,592
    ME, XP,Vista,Win7,Win8,Win8.1


    Take a look at those posts for more info.

    Windows 8 and Windows 8.1 ISO - Download or Create

    How to download Windows 8.1 ISO with a Windows 8 key.
    How to download the Windows 8.1 ISO

    Activate retail Windows 8.1 with Windows 8 Product key.
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