Bios for booting into a usb flash drive?
Answer:
If you know the flash drive supports booting, after it sounds like your BIOS merely doesn't support booting from flash device, quite a few do not support this.
A BIOS update might fix that, but be aware, if you do anything wrong, or anything go wrong upgrading the BIOS you computers motherboard will be toast and you will probably have to replace it. A immensely few select and expensive motherboards have a channel to recover from this, but that's pretty exceptional.
The BIOS updates are specific to your motherboard, generally specific to an exact revision of your motherboard. Use the wrong one and by by motherboard.
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