Unlike BIOS, which simply executes code in a disk's first sector, UEFI understands filesystems (primarily FAT32) and searches for specific files: UEFI boot explained (for Linux users)
The shift from BIOS to UEFI introduced several critical improvements: UEFI Boot
Unified Extensible Firmware Interface (UEFI) boot is the modern standard for starting up a computer, essentially acting as a "mini-operating system" that bridges the gap between hardware firmware and the main operating system. It was developed to replace the aging BIOS (Basic Input/Output System), which had been the standard since the early 1980s but struggled with the demands of modern hardware. Core Advantages Over Legacy BIOS Unlike BIOS, which simply executes code in a