Understanding BIOS and UEFI

Understanding BIOS – Lenovo Device


Have you heard the words BIOS, UEFI and never really understand what they meant? Learn about these important components so that you keep your computer up-to-date.


BIOS and UEFI (Unified Extensible Firmware Interface) are two firmware interfaces for computers which work as an interpreter between the operating system and the computer firmware. Both of these interfaces are used at the startup of the computer to initialize the hardware components and start the operating system which is stored on the hard drive.

UEFI was introduced in Windows 8 to replaces BIOS. UEFI firmware provides technical advantages over a BIOS system.