If you do not see the drive in the boot list with a manual trip (F12 at powerup), the system does not see it as UEFI-bootable. It looks like you must manually build a Windows PE bootable flash drive -- the software does not seem to have the ability to do this for you.  See here: [URL]  
Hi, I've always used ImageX to backup my computer. I got this laptop (without a CD Drive) so I cant boot to my ImageX CD. I bought a USB CD drive, but cant figure out how to boot to it. The only posts I see are how to do a BIOS update boot. I need to be able to boot to the USB CD drive (or a USB stick if necessary) so I can do a backup. I have looked at the boot menu and the BIOS settings and there is no choice to boot to an external device. Please Help !
Dell Lattitude 3310 2 in 1 How do I boot to an external CD or USB stick?