In the world of computer hardware, UEFI (Unified Extensible Firmware Interface) and BIOS (Basic Input/Output System) are both essential for booting up your computer. While they serve the same general purpose — initializing hardware and starting the operating system — they do so in different ways. In this guide, we’ll compare UEFI and BIOS to help you understand their differences, their advantages, and their impact on your computer’s performance.