Had to follow the activation by phone. Could not do it directly through Windows.
Pretty straightforward to do, 5 mins top but pretty annoying procedure.
Eventually, it works ATM.

Excellent! Took 2 minutes and works perfectly!

Although the inital key they sent me it didn't work, we resolved the issue fast and they sent me a new fully working one!

First key didn't work, second one was great! Thanks!

he give me another code all working thx <3