Boot Menu -USB HDD

[utu]

How do I check the capabilities of my BIOS/UEFI? Where do I look and what do I look for?

For example, with my Dell Inspiron:

Immediately select either Function Key FN-2 or FN-12 before any boot process starts.

With FN-2, one may select any one of a number of devices from which to boot;
if USB is a choice, select that and a LiveUSB like Knoppix should boot this time only.
If no choice is made here, the first bootable device available in the sequence shown
will be selected for booting. FN-2 also allows you the same option as FN-12 to
re-arrange order of sequence of devices from which to boot.

With FN-12, if USB is a choice, arrange the sequence such that USB is first and a LiveUSB
like Knoppix should boot every time its USB is plugged-in. If the sequential order is saved,
re-arranging the order of sequence of devices from which to boot needs to be done only once.

If USB is available, but not a choice for booting, and if CD is both available, and a
choice for booting, then it is possible to use a Knoppix boot-only CD to achieve booting
from a Knoppix LiveUSB. In this case, one would use FN-2 or FN-12 to select CD to be
first in the order of sequence to boot from the Knoppix LiveUSB.

Your computer may be slightly different; see your owner's manual if it is.