Thank you Brink, that helped alot. So the free upgrade is actually just on "one system" and I dont receive an own key that I could use on different systems right?

test Nr. 2

test

I wish it worked :/

Does that mean, that everyone who upgraded to Win 10 has a generic key right now? Im asking because I didnt get a "personal Win 10" key after upgrade, my windows 10 is still running with a generic...