1.    05 Jun 2017 #1
    Join Date : Oct 2014
    Posts : 207
    Windows 10 x64

    Previously used license keys, which one to re-use for a VM

    I always been buying retail versions of Windows.
    Right now I have a few licenses from v7/8/8.1 upgraded to W10 and a single new retail license (USB thumbdrive) of Windows 10.

    The new retail version I use on my host pc.
    The 'upgraded' versions I have used/installed/uninstalled before on another pc or as VM, but all deactivated.

    I have the first/original v7/v8-license keys, but probably they became null and void after they have been upgraded to W10(?)

    There is 1 VM running using some 'upgraded' license key.
    I'd like to create a new, 2nd, VM, using another key.

    Here is the problem:
    Frankly, I have no idea how to proceed.
    I may install CU version from USB (media creation tool), but likely at one point in time I may need to enter a key.
    However, I don't know which key has been used for the existing VM, i.e. which of the remaining upgraded keys are 'free' to use.

    Any suggestions as to how to proceed. Is this a kind of trial and error and see which key is accepted?

      My ComputerSystem Spec
  2.    05 Jun 2017 #2
    Join Date : Dec 2015
    Posts : 5,855

    Original keys always remain valid.

    You can still activate Windows 10 with 7/8 keys.

    So just install and use any key - it may object key is in use, if so try next one.

    Once it works, make note of key and which vm.
      My ComputerSystem Spec
  3.    05 Jun 2017 #3
    Join Date : Oct 2014
    Posts : 207
    Windows 10 x64
    Thread Starter

    Many thanks indeed! Truly appreciate the quick feedback.
    Windows is now installing in VM in the background using a Windows 8 key.
    Again, thanks!
      My ComputerSystem Spec


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