Installed Windows 10 on top of legit Windows 8.1 - how to perform a clean install?

Discussion in 'Windows 10' started by MonarchX, Jul 24, 2015.

  1. MonarchX

    MonarchX MDL Expert

    May 5, 2007
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    I installed Windows 10 OEM Pro x64 on top of legit Windows 8.1 Pro x64. It now says "Windows is Activated" in Control Panel > System. How do I get a proper key for Windows 10 now to perform a clean install? There is so much info on this site, but I could not find the exact information I needed...
     
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  2. joluboga

    joluboga MDL Member

    Dec 4, 2011
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    You don't need any key. Just install Windows and when it asks for a key, just skip it. Both times.
     
  3. Kyhi

    Kyhi MDL Novice

    Jul 16, 2015
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    if you clean install you will lose activation - the best way to clean install windows now - is to use recovery / reset PC

    been testing provisioning packages .ppkg for the last several days.. Reset is a GREAT freature
     
  4. joluboga

    joluboga MDL Member

    Dec 4, 2011
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    That's not true at all. If you clean install, Windows will reactivate itself, once it's connected to the internet.
     
  5. wiredfin

    wiredfin MDL Novice

    Mar 20, 2015
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    If you upgraded your Win 8.1 to 10 and then do a clean install SKIP the product key prompts. Boot up normally and you are activated. No need for product key!
     
  6. Mr.X

    Mr.X MDL Guru

    Jul 14, 2013
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    #6 Mr.X, Jul 24, 2015
    Last edited: Jul 24, 2015
    Yep. Once the clean Windows 10 installation retrieves HWID of your machine and from M$ activation servers. The edition is also tied to this HWID.

    HWID is calculated by a M$ algorithm using your onboard NIC MAC address and CPU id. hehe.
     
  7. Hans Moleman

    Hans Moleman MDL Novice

    Jul 23, 2015
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    Is this true? I have windows 10 10240 upgrade activate, but I want clean install. If I clean install can I activate with no key in BIOS and only Windows 7 Pro key?

    Thank you for helping Hans Moleman :eek:
     
  8. joluboga

    joluboga MDL Member

    Dec 4, 2011
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    You don't need any key for a clean installation of Windows 10... AS LONG as you have upgraded first and got activated.

    When you do a clean install, just skip the two serial number requests and Windows 10 will activate itself when you connect to the internet.
     
  9. Mr.X

    Mr.X MDL Guru

    Jul 14, 2013
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    Forget the "hehe" part of my previous post... yes it is true.
     
  10. lunario

    lunario MDL Senior Member

    Aug 5, 2012
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    #10 lunario, Jul 24, 2015
    Last edited: Jul 24, 2015
    if its activated after you upgraded you don't need keys.. jus clean install and skip the key entering.. it will auto activate when online


    too many replies :D
     
  11. psichokillah

    psichokillah MDL Novice

    Jun 4, 2015
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    And if it's not legit? Activated with KMSPICO, will it behave the same? :confused::confused::confused::confused:
     
  12. Mr.X

    Mr.X MDL Guru

    Jul 14, 2013
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  13. andy.tay70

    andy.tay70 MDL Junior Member

    Dec 15, 2013
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    you forgot thr hehe again hehe