UEFIkäynnistystä

UEFIkäynnistystä refers to the process of booting a computer system using the Unified Extensible Firmware Interface (UEFI) standard. UEFI is a modern replacement for the traditional Basic Input/Output System (BIOS). It acts as an intermediary between the operating system and the computer's hardware during the startup sequence.

When a computer is powered on, the UEFI firmware initializes the hardware and then loads the operating system boot loader. Unlike BIOS, UEFI can boot from drives larger than 2 terabytes and supports more advanced features like secure boot, which helps prevent malicious software from loading during startup. UEFI also allows for a more graphical and interactive pre-boot environment. The boot loader, which is stored in a dedicated EFI System Partition (ESP) on the storage device, is responsible for loading the operating system kernel into memory. This transition from firmware to operating system is a crucial part of the computer's startup process.