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  1.    27 Apr 2016 #1
    Join Date : Apr 2016
    Manchester, U.K.
    Posts : 551
    Windows 10 Pro 64bit

    Hypothetical question re Win 10 home-Pro upgrade.


    I've asked this on various Windows forums & received conflicting replies; some say it'll works while other say it won't, posting here to get a genuinely honest answer.
    Long story so bear with me.

    I previously has a Vista premium/pro laptop which was retired & I bought a Win 7, this came with the Win 8 upgrade offer which I chose to receive on CD which came with a Windows 8 pro key. Before I could install win 8 on win 7 laptop, it failed so I received a refund but was left with the upgrade & key doing nothing. I installed Win 8 over Vista & eventually I also upgraded Win 10 after several months of Windows 8/8.1 working fine.
    Now I have a Win 10 home laptop as old one died, my question is can I use the win 8 pro key to upgrade win 10 home to pro or was it absorbed into Windows 10 upgrade on the old Windows Vista-Windows 8 laptop.
    I just want to make sure before I throw the CD & key away that it cannot be used again to install Win 8 or upgrade Windows.
    TIA,
      My ComputerSystem Spec
  2.    27 Apr 2016 #2
    Join Date : Oct 2013
    Newport, South Wales, UK
    Posts : 1,829
    Windows 10 Pro x64 FCU - XP/Vista/Win7/Win8.1 in VM for testing

    First question - (and probably the only one that really matters) - did the various OS versions come pre-installed on on a system, (supplied by the manufacturer)?

    If this is the case then the OS is tied to the original hardware and "dies" with that system, it may be upgraded but not transferred to another system.

    If the OS you have is a Retail OS then this can be transferred as many times as you wish, as long it is only in use on one machine at any time.
      My ComputerSystem Spec
  3.    27 Apr 2016 #3
    Join Date : Apr 2016
    Manchester, U.K.
    Posts : 551
    Windows 10 Pro 64bit
    Thread Starter

    Yes the Vista was pre-installed & had the key on the bottom of the laptop, when I upgraded I then entered the key which came with Win 8.
      My ComputerSystem Spec
  4.    27 Apr 2016 #4
    Join Date : Aug 2015
    Maine
    Posts : 38,752
    Windows10Pro 64Bit

    Quote Originally Posted by Doctor9fan View Post
    Yes the Vista was pre-installed & had the key on the bottom of the laptop, when I upgraded I then entered the key which came with Win 8.
    What you can do is download a program made by one of our members here. Run this program on the computer in question and it will report to you the Key # and if it is a OEM key or a Retail Key. If its reported as Retail then you can use it to upgrade to Windows 10, same version Home for home ..Pro for Pro
    https://www.tenforums.com/software-ap...7-showkey.html
      My ComputersSystem Spec
  5.    27 Apr 2016 #5
    Join Date : Jan 2016
    Henderson
    Posts : 147
    Windows 10 Pro

    Quote Originally Posted by Doctor9fan View Post
    Yes the Vista was pre-installed & had the key on the bottom of the laptop, when I upgraded I then entered the key which came with Win 8.

    Just enter the key and see if it takes. Make sure its not activated on the other machine. You should find the upgrade to pro on the lower portion of the System page. If it doesn't take it will say its not a valid key, and if it does work, celebrate!!
      My ComputerSystem Spec
  6.    27 Apr 2016 #6
    Join Date : Dec 2013
    Portsmouth Hampshire
    Posts : 1,837
    Windows 10 x86 14383 Insider Pro and Core 10240

    The Win 8 offer in 2012 was a retail license if offered with Windows 7, even if the installed Windows 7 was OEM - as OldMike says, run Showkey for confirmation.
      My ComputersSystem Spec
  7.    27 Apr 2016 #7
    Join Date : Apr 2016
    Manchester, U.K.
    Posts : 551
    Windows 10 Pro 64bit
    Thread Starter

    I no longer have the original Vista/Win 8/8.1-10 laptop as MB failed, I know the current laptop has OEM version of Win 10 home.
      My ComputerSystem Spec
  8.    27 Apr 2016 #8
    Join Date : Apr 2016
    Manchester, U.K.
    Posts : 551
    Windows 10 Pro 64bit
    Thread Starter

    Quote Originally Posted by AnEdge View Post
    Just enter the key and see if it takes. Make sure its not activated on the other machine. You should find the upgrade to pro on the lower portion of the System page. If it doesn't take it will say its not a valid key, and if it does work, celebrate!!
    Will try that later, haven't so far as I didn't wish to mess up the original OEM key but if it just rejects the key if it isn't valid then it's worth a shot.
      My ComputerSystem Spec
  9.    27 Apr 2016 #9
    Join Date : Jan 2016
    Henderson
    Posts : 147
    Windows 10 Pro

    Quote Originally Posted by Doctor9fan View Post
    Will try that later, haven't so far as I didn't wish to mess up the original OEM key but if it just rejects the key if it isn't valid then it's worth a shot.
    Let us know how it works out, good luck. Just make sure you go to upgrade link, and not to the change the product key link. I know its a trivial point, but I've seen some make that mistake over the years.
      My ComputerSystem Spec
  10.    27 Apr 2016 #10
    Join Date : Jul 2015
    Posts : 9,418
    Windows 10 Pro

    Quote Originally Posted by Doctor9fan View Post
    Will try that later, haven't so far as I didn't wish to mess up the original OEM key but if it just rejects the key if it isn't valid then it's worth a shot.
    An upgrade from Windows 10 Home to Pro using just a Windows 8 Pro key has never worked, even with valid Windows 8 Pro keys. The only way it works is to enter the generic Windows 10 Pro key to trigger the upgrade first, and after the upgrade, enter the Windows 8 Pro key to activate it.
      My ComputerSystem Spec

 
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