You may still call it the BIOS out of habit, but make no mistake: the BIOS is long gone. UEFI is what brought the PC platform into the modern era, and it has been doing the heavy lifting for years.

If you're wondering what your computer's BIOS or UEFI is, and whether or not you need to update it, you've come to the right place. I'll explain what these terms mean, what these pieces of software do ...