I waited at least 10 minutes one time and even more the second time.
So the tech support wrote me quickly with some procedures to do.
Removing all the modules… no luck
removing ssd, memory and wifi… no luck
removing the little battery and the main battery, wait 20 minutes and replug everything… no luck
then the next day, they asked me
to remove the bezel, removing the display cable, checking it and replug everything… no luck
finally, they asked me to put only one RAM in slot 0 and remove the one in slot 1 and ssd
And I saw the screen flashing and finally got the Framework logo!
I installed back the second RAM and SSD and the system started the update again and shut down the computer.
I start it again, got again an update and shut down.
The third time, I was able to get back to my Windows! 
So I’M VERY HAPPY of Framework’s support!