How did you create the boot USB? What program did you use? Rufus? In ISO mode or dd mode? Rufus is known to be problematic, and if writing ISO to usb stick, it must be done in dd mode.
How did you create the boot USB? What program did you use? Rufus? In ISO mode or dd mode? Rufus is known to be problematic, and if writing ISO to usb stick, it must be done in dd mode.