I got a really really fast computer from my previous employer with a valid windows 10 license (Enterprise) as a farewell gift when I left them in December 2016.

Yesterday my 3 year old daughter magically entered the Windows Activation window and entered a bogus key.
Since my previous boss doesn't work there anymore and you have to log into the corporate domain to re-enter a valid corporate key.. I was forced to buy a valid key.

Well, at least now the license is mine. But it was expensive...