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  1. Joined : Dec 2015
    Posts : 12
    Windows 10
       2016-01-02 #20

    Brink said: View Post
    Windows 10 can now be directly activated with a Windows 7 or Windows 8/8.1 product key that you have upgraded from to Windows 10.
    But activation would not be successful if you receive the following error message: This product key is being used on another PC.

    So you will first need to perform a clean installation of Windows 7/8/8.1 to a new computer and then activate your copy of Windows 7/8/8.1.

    Click image for larger version. 

Name:	This product key is being used on another PC. Please try a different key. Error code 0x803FA071.png 
Views:	255 
Size:	38.5 KB 
ID:	56725
      My System SpecsSystem Spec


  2. Joined : Oct 2013
    Posts : 17,490
    64-bit Windows 10 Pro build 15014
       2016-01-02 #21

    If it's actually for the same PC you are trying to activate on, you should be able to just activate by phone instead of having to do a clean install.

    On a new PC, then yes a clean install will be needed.
      My System SpecsSystem Spec


  3. Joined : Jun 2014
    UK
    Posts : 623
    W10 pro x64 and W10 x86
       2016-01-03 #22

    Nipax said: View Post

    It does not work if you are using a Windows 7/8/8.1 product key.

    You will first need to perform a clean installation of Windows 8.1 to a new computer and then activate your copy of Windows 8.1. If you receive an error message saying "This product key is being used on another PC. Please try a different key." then you will need to select the "Call support" option, if you want to activate your copy of Windows 8.1.

    When Windows 8.1 is activated, just do a fresh Windows 10 install (enter your Windows 8.1 key). Or, you can upgrade Windows 8.1 to Windows 10.
    Thanks. I've done as you suggested and installed 8.1 onto the PC in question and following automated phone activation W8.1 is now activated.

    I now want to clean install W10 and so I understand I now need to enter the W8.1 product key into the W10 initial screen... which it does say 'if you are installing a different version..... etc'.

    That's going to be a 5 or 6 hour install again (buggy driver). I just glad I didn't put the time in setting the first W10 install up with all my software and so on.
      My System SpecsSystem Spec


  4. Joined : Dec 2015
    Posts : 12
    Windows 10
       2016-01-03 #23

    Mooly said: View Post
    I now want to clean install W10 and so I understand I now need to enter the W8.1 product key into the W10 initial screen...
    Yes.

    When installation is finished, Windows 10 will be activated automatically.
      My System SpecsSystem Spec


  5. Joined : Jun 2014
    UK
    Posts : 623
    W10 pro x64 and W10 x86
       2016-01-03 #24

    Lets hope so. I'm just at the early stages of the install (only 1 hour in) and so haven't found out yet.
      My System SpecsSystem Spec


  6. Joined : Jun 2014
    UK
    Posts : 623
    W10 pro x64 and W10 x86
       2016-01-03 #25

    Well... W10 has activated OK

    So I did have to install 8.1 first, activate using the automated phone service, and then clean install W10 entering the W8.1 product key at the start of the W10 installation. So as Nipax suggested, simply clean installing W10 doesn't seem to work without first installing W8.1 that the license key relates to.

    Thanks
      My System SpecsSystem Spec


  7. Joined : Jun 2016
    Posts : 2
    Win 10 Pro
       2016-06-28 #26

    Hi..
    I have a situation.. I had 2 computers running Windows 7 pro.. I upgraded 1 to Win 10 and it was Activated.. In error, I used the same product key for Win 10 to activate the 2nd computer.. and it went through.. So now I have 2 computers with the same Windows 10 product key and both Activated... I tried to change the product key with a Windows 8.1 key that my school provided me with...once I input the win 8.1 product key...it goes through and I get the message, "Windows is activated"...but it does NOT change the product key.. so both computers have the same Product Key.... will this be an issue later even though both are activated?
      My System SpecsSystem Spec


  8. Joined : Jul 2015
    Posts : 6,890
    Windows 10 Pro
       2016-06-28 #27

    On the activation tab of the updates & security settings menu, do the computers show as activated with a digital entitlement? If they do, then you are good to go. The digital entitlement is stored on Microsoft activation servers.
      My System SpecsSystem Spec


  9. Joined : Jun 2016
    Posts : 2
    Win 10 Pro
       2016-06-28 #28

    NavyLCDR said: View Post
    On the activation tab of the updates & security settings menu, do the computers show as activated with a digital entitlement? If they do, then you are good to go. The digital entitlement is stored on Microsoft activation servers.
    Yes, they both say "Windows 10 on this device is activated with a digital entitlement." - - - I was doing more research and noticed that others have the same product KEY as I do.. ending in 3V66T.. I guess those are system generated keys and what matters is the Product ID activation?
      My System SpecsSystem Spec


  10. Joined : Jul 2015
    Posts : 6,890
    Windows 10 Pro
       2016-06-29 #29

    macster said: View Post
    Yes, they both say "Windows 10 on this device is activated with a digital entitlement." - - - I was doing more research and noticed that others have the same product KEY as I do.. ending in 3V66T.. I guess those are system generated keys and what matters is the Product ID activation?
    It's actually the Installation ID which is made up of a number of components, one of which is the Hardware ID which is what makes the Installation ID unique to that computer.
      My System SpecsSystem Spec


 
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