Hello there,
Yesterday, I tried to upgrade from Windows 8.1 with the automatic upgrade tool : everything seemed fine, the install process was going on, the PC restarted several times but then stucked on the flat blue Windows logo ...
I left it as is at least half an hour, then hard restarted the PC, but it's still stuck on this logo ...


Dunno what to do now ! Any idea ?

Thks for helping