I had Windows 10 in my laptop. I performed a clean install due to Inaccessible_Boot_Device error that prevented me from starting it at all. After the clean install Windows starts normally but it is not activated. I upgraded from windows 8.1 Home before. According to Microsoft, Windows shall be activated even after a clean install as long as it was first installed using the free upgrade. How can i resolve this issue? Is there a way to extract it from BIOS?
I have HP Envy dv6.
Update: I reset the device. Same problem. Then i restarted it and there is a new thing. In the activation section in "Update & Security" it says: connect to the internet to activate Windows. And there is error details in the same section that says: The activation server determined the specified product key is blocked. !!!!! What is that?