GUEFI Boot Manager

[fhasnain]

Hi
My GUEFI boot manager does have a USB boot option. I cannot boot from a bootable USB. Please help me with adding the USB boot option.

[djemos]

Shutdown laptop or desktop pc. Plug in the usb. Then press power button and immediately press Fn+F12 (my lanovo laptop) to go to boot manager. In your system F12 maybe is different.
You will see a choice USB to boot from.

[gapan]

It could also be that you have secure boot enabled. You need to disable that in the UEFI settings.

By the way, it is UEFI. GUEFI is a graphical tool we have for managing UEFI and I guess that is not what you meant.