️ ️ BIOS — (basic input/output system or basic input/output system) — (non-power-demanding) program installed on the motherboard.
⚡️Its functions:
• Loading the operating system;
• Device search and diagnostics;
• Providing an interface for configuring the device.
⚡️Most popular settings:
• Cooler rotation speed;
• Setting the operating frequency for the motherboard;
• Enable / disable additional devices;
• Boot sequence (from which devices to boot the computer).
⌨️ Most of the time, the F2 key is pressed when the computer is turned on to enter the BIOS. This is necessary to choose whether the computer will boot from a disk or a flash drive. Because the BIOS provides the ability to detect devices, in rare cases, a new device may not work with an older version of the BIOS. In this case, you need to update the BIOS.
A new version — UEFI — is installed on new computers and laptops.
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What is UEFI?
i ️ UEFI — (Unified Extensible Firmware Interface or unified extensible software interface) — firmware installed on the motherboard. Created to replace BIOS. Similar to the BIOS, it controls the device at a low level and runs the initial setup of the computer.
⚡️Main features of the new system:
• Built-in download manager.
• Personal graphic interface for settings.
• Ability to load the operating system from GPT disks.
• Save errors after NVRAM failure (by OS if possible).
UEFI may prevent the computer from booting from a USB flash drive or installing earlier versions of Windows (7 and below) and Linux. In this case, it can be disabled. To do this, you need to switch to Legacy in UEFI or disable Secure Boot.
