I'm trying to boot from a usb but its not showing up on BOOT loader (F12). I go into the bios and try to change the boot order in STARTUP but the USB I'm trying to boot from is in the EXCLUDED section and can not move it up to load from usb as first option.
running windows 10 on Lenovo H520s with BIOS REVISION LEVEL ECKT16A. Also shows BOOT BLOCK REVISION LEVEL EC16A, BIOS DATE 04/06/2012 (seems to be latest update).
how can I change it to be able to boot from usb sticks/external cd/dvd?