- Jul 23, 2012
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Okay, so I've upgraded two computers so far from 8.1 to 10 and I'm still not sure what happened or how it works, I hope someone here can bring me some clarity. 
My process was this:
1) Upgrade via Windows Update to Windows 10, Windows 10 on both computers became activated.
2) Use Keyfinder to save the product keys.
3) Downloading ISOs and creating bootable USBs (used RUFUS since the Microsoft tool didn't manage to make the USB bootable on the UEFI-computer).
4) Formated the computers, made clean installs, entered my product keys from step 2 during installation.
5) Problem with activation, re-entered product key, had to go to Store which confirmed I had a genuine copy of Windows etc, re-entered product key again etc. (Guessing problems with the activation servers or something, because after 15 minutes one computer was activated, the other one was activated after approximately 1 hour.)
However, when I started Keyfinder again today I noticed I have a new product key on the clean installs. It's not the same product keys I saved after upgrading from 8.1 or entered during and after the clean install.
Does this mean that the whole step of saving the product keys was unneccesary? And more so, does this mean that the upgrade was completely pointless? Since the clean install gave me new product keys, and genuine versions of Windows 10 which both got activated.
And if this is the case, does this mean that I can go on and do clean installs on computers with Vista/pirated versions/Linux/etc? (On 'Blogging Windows' Microsoft said that upgrading a non-genuine version of 7/8 would lead to a non genuine version of Windows 10, however if a clean install isn't using the product key gained from the upgrade and still activates Windows 10 seems to be free for all.)

My process was this:
1) Upgrade via Windows Update to Windows 10, Windows 10 on both computers became activated.
2) Use Keyfinder to save the product keys.
3) Downloading ISOs and creating bootable USBs (used RUFUS since the Microsoft tool didn't manage to make the USB bootable on the UEFI-computer).
4) Formated the computers, made clean installs, entered my product keys from step 2 during installation.
5) Problem with activation, re-entered product key, had to go to Store which confirmed I had a genuine copy of Windows etc, re-entered product key again etc. (Guessing problems with the activation servers or something, because after 15 minutes one computer was activated, the other one was activated after approximately 1 hour.)
However, when I started Keyfinder again today I noticed I have a new product key on the clean installs. It's not the same product keys I saved after upgrading from 8.1 or entered during and after the clean install.
Does this mean that the whole step of saving the product keys was unneccesary? And more so, does this mean that the upgrade was completely pointless? Since the clean install gave me new product keys, and genuine versions of Windows 10 which both got activated.
And if this is the case, does this mean that I can go on and do clean installs on computers with Vista/pirated versions/Linux/etc? (On 'Blogging Windows' Microsoft said that upgrading a non-genuine version of 7/8 would lead to a non genuine version of Windows 10, however if a clean install isn't using the product key gained from the upgrade and still activates Windows 10 seems to be free for all.)