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What is UEFI and what does it consist of?



So that our computer can turn on correctly depends on a system that has evolved over time, do you know what UEFI is and what it consists of? We tell you.

In addition to the components that we all know (screen, processor, battery, graphics card), the PCs need an internal system whose code contains the instructions necessary to make a safe start and that sets up the machine to start using it. This is UEFI, although it was not always on computers.

Before including UEFI, desktops and laptops had another system that was in charge of the same task but with some differences. We are talking about the BIOS, which since 1975 was responsible for starting the hardware and software of computers.

This series of instructions is located on the motherboard of each PC and from there it is responsible for starting, configuring and verifying that all the hardware is in good condition: RAM, hard drives and graphics card. The BIOS has been a substantial part of computers for years, but of course, the years go by and they don't forgive.

During the 1990s, large technology companies realized that this code had become obsolete and was no longer useful for the new PCs that were being designed, that is how UEFI, its successor, was created.

The first step was taken by Intel, but it was in 2015 when Intel, AMD, Apple, Dell, Lenovo, Microsoft and so up to 140 companies joined together to create the UEFI foundation and move this project forward. Basically it is a BIOS, but with additional functions that make this code more secure, faster and support hard drives of more than 2 terabites.

One of the main differences between UEFI and the old BIOS is that its interface is much more modern and intuitive, it allows to include animations, sounds and to navigate with the mouse, while the old system only allowed to operate with the keyboard.

On the other hand, UEFI can connect to the Internet to update from time to time and runs in 32 or 64 bits. In addition, it allows you to add third-party tools such as overclock and faster computer.

But, without a doubt, the best feature and what this system was designed for is its security against the malware that was attacking the BIOS. The UEFI system has Secure Boot, that is, secure boot. A program designed for devices with the Windows operating system and that blocks any system that is not certified, protecting us from any malware, although it has also had some compatibility failure with some Linux programs, but that is another story.

Gradually, cybercriminals have been developing new more sophisticated attacks that have broken the UEFI barriers as they did with the BIOS, so it will be necessary to design a new, stronger boot program that exceeds the functions that UEFI offers us today.