How UEFI works?

1. Introduction
2. How to use the UEFI
3. Read also

Introduction:

The Unified Expandable Firmware Interface (UEFI) is a specification for a program that connects a computer's firmware to its operating system (OS). The UEFI should eventually replace the BIOS.

Like the BIOS, UEFI is installed at the time of manufacture and it is the first program that runs when a computer is turned on. It checks the hardware components of the computer device, turns off the components and transmits them to the operating system.

UEFI meets several BIOS limits, including restrictions on the size of the hard disk partition and the amount of time the BIOS takes to perform its tasks. This firmware offers new features, including faster start-up and increased security. It replaces the BIOS (basic input / output system).

It also provides an operational environment for OS and boot-time applications and services.

Since UEFI is programmable, OEM developers can add applications and drivers, allowing UEFI to function as a lightweight operating system.

The UEFI interface is managed by a group of chipset, hardware, system, firmware and operating system vendors called UEFI Forum.

How to use the UEFI:

To access the interface and the UEFI settings menu:

1. Start (or restart) your PC.

2. Whenever your operating system starts, press and hold the "F2" key. If you have a desktop PC and you have not been able to access the UEFI interface, please turn off your computer and turn it on by pressing the "Delete" key.

3. The UEFI menu will be displayed a few seconds later.

The first page displays the processor used, voltage settings, temperature, processor fan speed, and so on. It is in the advanced mode zone (F7) that the actual indications and settings will be useful.
You will notice that most of the old BIOS commands are present The menu is gathered in 6 parts.

• Main: the system's global information, processor and memory, allows you to set the date, time and language, add passwords at startup, or access the settings. Its main interest is access to the security part.

• AI Tweaker: corresponds to Advanced BIOS Features Setup of the old BIOS and gathers the possibilities of over cloaking. It allows to adjust the performance of the processor and the RAM.

• Advanced: Allows you to manage major devices, processor settings, SATA configuration, USB, PCH, enable or disable embedded devices. For example, it activates the integrated sound card, the network card, and the serial and parallel port configuration.

• Monitor: displays the different temperatures and fan speeds, including processor and motherboard, fan speed, is a CPU protection. The speed of the tower or processor fans can also be set manually.

• Boot: allows you to set the boot order of the devices, the numeric lock, the display of the motherboard brand logo at startup, and the keyboard type - mouse detection and message management. 'error .

• Tool: utility that allows to flash its BIOS UEFI or the automatic parameterization of the memories via the Eprom SPD integrated on the memory modules from the DDR.

Read also

How to manually update drivers in Windows 10

How to Create a USB Recovery drive for Windows 10