Windows 10: how to tell if pc upgraded to windows 10 or clean install

Discus and support how to tell if pc upgraded to windows 10 or clean install in Windows 10 Updates and Activation to solve the problem; In addition you can tell by looking in the registry. If you upgraded there will be a key HKEY_LOCAL_MACHINE\SYSTEM\Setup\Upgrade if your system has... Discussion in 'Windows 10 Updates and Activation' started by reddwarf4ever, Dec 14, 2015.

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  1. REDDWARF4EVER
    reddwarf4ever Win User

    how to tell if pc upgraded to windows 10 or clean install


    thanks, what is meant by upgrading from 10240 to 10586 ? does this mean through windows update ? if so then if it has been updated to the current build and this registry key has been created, then it is no lomger possible to tell...
    but luckily I dont need to know now, but very interesting, thank you
     
    reddwarf4ever, Dec 14, 2015
    #16
  2. LX07
    lx07 Win User

    it is still an upgrade if done through Windows update, yes.

    Found a better place to check upgrade history...

    Within the HKEY_LOCAL_MACHINE\SYSTEM\Setup key are subkeys Source OS (Updated on mm/dd/yyyy hh:mm:ss) for every build you have ever installed. For example here I clean installed my first build (9600) on 3rd October 2014 and have upgraded 9 times since.


    how to tell if pc upgraded to windows 10 or clean install [​IMG]


    Perhaps not useful but interesting *Smile
     
    lx07, Dec 15, 2015
    #17
  3. REDDWARF4EVER
    reddwarf4ever Win User
    as Spock would say " fascinating"
    thank you
     
    reddwarf4ever, Apr 5, 2018
    #18
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how to tell if pc upgraded to windows 10 or clean install

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