I just contacted MS support and they gave me a new key... Everything is solved now :D

Is there absolutely no other way? My laptop is still under warranty, can I ask HP to do something about it?

72485

It gives me this error when I enter that key
72478

Yes it does shows the OEM key and OEM Edition which is "win 8.1 RTM" which was pre installed on my laptop

Now I am getting new error. 72463

Hello,
I recently did a clean install of windows 10 (over my free upgrade of windows 10 from 8.1). Previous windows 10 version was properly activated and I used it for 6 months.

In this process...