Your BIOS is saved in a type of non-volatle memory; "flash memory".
Flashing your bios is basically just rewriting it, but it has some risk to it. If the BIOS flash is stopped, (due to you turning your computer off, etc) while it's writing, your BIOS could be useless.
Flashing your bios is basically just rewriting it, but it has some risk to it. If the BIOS flash is stopped, (due to you turning your computer off, etc) while it's writing, your BIOS could be useless.