Kenmitch shows one easy alternative. In the old days, you had to make a 3.5" floppy with the BIOS file on it as a source for the flash.
I've probably done between one and two dozen BIOS flashes since 1995. Only one time, maybe 15 years ago, did I bork the motherboard or BIOS chip and thought to RMA the board. [Replacing boards is a tedious hassle; seem my thread on "Windy days and static charges".]
These days, you can either flash the BIOS from within Windows or from the existing BIOS, which has a submenu for it. At some point, you'd insert a USB stick with the BIOS file, or, alternatively, the BIOS might just go out on the internet and grab the update. Personally, I like to have control of the process, so I copy the BIOS file to a USB stick.
The board that got borked had a very large BIOS file. Something went wrong with the BIOS chip, as if there "wasn't enough space" or something. Before that and since then, it's never given me any trouble. I might have avoided the RMA by going online to find an outfit like "BIOS-Man" to send me a replacement BIOS chip, flashed with the version I wanted. That's always an easy possibility, provided that the chip is socketed to the board, as opposed to being soldered in.
It's not something you will be inclined to do very often, especially if you have overclock settings, which need to be re-entered when you first boot the system into the new BIOS. It's extra tedium. Only certain things dictate a need to do it, and I wouldn't advise troubling yourself unless it's needed. Sometimes, upgrading to a newer CPU may require it, but not much else.