UE5-00 Final don't start on laptop stuck at Initializing 0

Hi there !
After exciting announcement video,
it s time for a frustrating sequence !

  • started as Admin,
  • Firewall opened,
  • installed from scratch , install then verified
  • all up to date
  • Quixel not installed
  • this is a second clean install, as I had a doubt I did something wrong at first.
  • PC is not RTX, but was not a problem on the previous version.
  • nothing moves on the task manager, it seems totally dead.
  • Tried to start from the desktop and also from the EPIC app.

any idea ? cache to clean somewhere. or a command ?

Any Help welcomed, thank you !!!