Once the system has passed POST, the BIOS then locates the operating system’s boot loader and hands over control of the system to it. If any issues arise, BIOS will either correct them or alert the user. During the boot process, BIOS performs a Power-On Self Test (POST) to verify the integrity and functionality of the memory, CPU, and other hardware components. Essentially, BIOS forms the bridge that allows your software to communicate with your hardware.īIOS plays several key roles. BIOS is a pre-installed program on a computer’s motherboard, responsible for initializing and testing the system hardware components when the computer starts up and providing runtime services for the operating system and apps. BIOS is an essential part of a computer’s anatomy that interfaces directly with your system’s hardware.
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