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  1.    03 Sep 2017 #31
    Join Date : Oct 2014
    New Jersey
    Posts : 1,387
    Windows 7 Pro x64 Windows 10 Pro x64

    But what information do you expect him to find with that ?

    He`s already reinstalled W7 and he said he has no key for it.
      My ComputersSystem Spec
  2.    03 Sep 2017 #32
    Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 10,436
    Windows 10 IoT

    The OP has clean installed at least once so the original Windows 7 key that was used to do the free upgrade is lost. It would have been an OEM-SLP key anyway. You can't use those keys to activate Windows 10 via manual key entry. They are blocked. Clean installing Windows 7 with stock install media will just get a generic "place holder" key, if you don't enter one manually. That key is also of no use. The key you need is the OEM-COA key, which is unreadable. Factory recovery media will restore the original factory OEM-SLP activation. They will charge you a fee for it though, "if" its still available.

    EDIT: Not that we don't appreciate the effort. In this case though, you can't get there from here.
      My ComputerSystem Spec
  3.    03 Sep 2017 #33
    Join Date : Apr 2017
    Posts : 8,710
    windows 10 professional version 1607 build 14393.969 64 bit

    Thanks for the clarification.......This link has similar information:

    Why you can't find your product key after upgrading to Windows 10 | PCWorld
      My ComputerSystem Spec
  4.    03 Sep 2017 #34
    Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 10,436
    Windows 10 IoT

    Quote Originally Posted by zbook View Post
    Thanks for the clarification.......This link has similar information:

    Why you can't find your product key after upgrading to Windows 10 | PCWorld
    On an upgrade the original key is stored in the registry. This utility will find it, ShowKeyPlus. Once you clean install after that its MIA though.
      My ComputerSystem Spec
  5.    03 Sep 2017 #35
    Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 10,436
    Windows 10 IoT

    I only watched the beginning of that video and saw errors right away. If you upgrade to Windows 10, you do get a new product key, and it is retrievable. Contrary to what she says. showkey will show you that key. It's a generic key though and of no real use to anybody. There is a Home key and a Pro key, etc. Those keys only work if that PC already has a Digital License for that Edition. You can't use them to cheat and get Windows 10 for free, or a free upgrade to Pro etc. They do have uses but going into any more detail is just off topic for this thread.
      My ComputerSystem Spec
  6.    03 Sep 2017 #36
    Join Date : Aug 2017
    Posts : 11
    Linux
    Thread Starter

    @alphanumeric, I'll do a clean install again (with diskpart scrubbing) and report back.

    slmgr /dlv gives an activation id and a notification reason, the latter is the same as the error code on the activation screen.

    The good news is that the watermark has disappeared for now!

    Update:
    @alphanumeric ... I can't believe that I've never noticed this sticker under the battery! I'm a little embarrassed. I'll do a clean install anyway and should sail through without a hitch with this COA.
      My ComputerSystem Spec
  7.    03 Sep 2017 #37
    Join Date : Aug 2017
    Posts : 11
    Linux
    Thread Starter

    Windows 10 Pro is now activated. Thank you very much for all your help!
      My ComputerSystem Spec
  8.    03 Sep 2017 #38
    Join Date : Apr 2017
    Posts : 8,710
    windows 10 professional version 1607 build 14393.969 64 bit

    Please post all of your troubleshooting steps so that others viewing the thread can learn from your experience
      My ComputerSystem Spec

 
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