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#31
Hi.
Can you grab the W7 key and also try the gatherosstate trick?
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Clean Install Windows 10 Directly without having to Upgrade First - Windows 10 Installation Upgrade Tutorials
Some have reported the activation servers from the free upgrade still working. (I was able to upgrade a W7 machine just a couple weeks ago.)
You could go back to the W10 installation, plug in the W7 key and see if that activates. If not, you could try the GenuineTicket.xml.
Just a thought.
Edit: I have heard of people having success when calling MS about activation problems. Guess it would be worth a try.