368px-Uefi_logo_svgWhat is UEFI and why do I care?

Simply UEFI is a replacement to the BIOS in a computer. This is the code that gets the PC working before the Operating System starts. One of the reasons UEFI is becoming mainstream is that to be certified “Windows 8 certified” a machine will need to use UEFI

I considered writing a longer article to explain this; however, I don’t think I can do a better job than Tony Bradley did in his PCWorld article from January 19th 2012. It is titled “R.I.P. BIOS: A UEFI Primer”. You can be find that here: http://www.pcworld.com/businesscenter/article/248426/rip_bios_a_uefi_primer.html 

Basic Input/Output System  (BIOS)
http://en.wikipedia.org/wiki/BIOS

Unified Extensible Firmware Interface (UEFI)
http://en.wikipedia.org/wiki/Uefi