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#11
Please complete Noels post #8
Although this is working at the moment, the fact that the same key has been used to activate two copies of Wndows 10 will be noticed by the systems at Microsoft, in time.
It is very possible that when the fact is known in the Microsoft system, that the Key will be blacklisted, and will not work on any system.
Microsoft's licensing systems have always included quite an overlap in machines where the same key is in use to allow legitimate transfers but they do re-visit these systems and "tidy up" every so often