Ba ouai ca me faisaait aussi bizard, mais meme le revendeur (kinguin) le dit dans un genre de FAQ:
If you have installed the correct Windows version and you are still unable to make use of your license (for example due to an error 0xC004C008), please use the automated phone system as in most cases this method solves the issue. In order to start the phone activation please type “SLUI 04” in the search box on the taskbar and press “Enter”. Then follow the instructions on the screen to activate Windows.
Et j'ai précisement cette erreure, apres au pire jai pris la garantie donc je pourrai tj faire une demande