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#21
Your description matches exactly what I did.
With Win10 running with User Administrator. I double clicked on the ISO file I downloaded. Win10_1607_N_English_x64.iso.
It opened a window D:\
I right clicked on Setup.exe and chose Run as administrator.
It asked me if I wanted to download updates. I selected Yes.
It asks me for a product key.
It would be nice if it would follow the tutorial you referenced.
Maybe it's not doing an in place update because I have two folders from a previous in place update I tried.
$GetCurrent
$Windows.~BT
Thanks,
Docfxit