If that is the case, turn it off and repeat. I will wager that secure boot is enabled in UEFI check for that first. Really scratching my head right now on this. even with the USB storage device attached straight to the port can't get it to recognize it as a boot device.
of course the thing only has one USB port on it (micro usb) so I have to put it into a USB HUB to get keyboard and USB at the same time. got into the bios of the thing and can't find any USB boot device options, only windows boot manager, secure boot is disabled too. even in the windows restore screen selecting boot from USB device only gives me boot to UEFI shell ugh. Well I tried that last night, and I can't get the darn tablet to boot from USB.
