I dont think so ill have to run my win8 iso and reactivate that then upgrade to 10 with that iso bah -_-.
I already knew this could happen but i read from microsoft official statements that you can...

Now i did a clean install with the w10 pro key that everyone got after i activated my machine once.
Now i get error the key has been blocked so it doesnt work guys, there is no such thing as a clean...

LOL this worked for me guys, from CMD.

Search for CMD right click run-as administrator must be run with admin rights
-then enter: slmgr.vbs /ato
Thats the command for activation it took me...

I tried spamming that thing endlessly 100 tries it doesnt work after upgrade from legit win 8.1 pro :((
I even have a mouse with macro auto spamm left click 5 times per second i keep repeating but...