What is UEFI?


If you’ve ever installed an operating system on your computer, you may have come across the term “UEFI”. But what is UEFI exactly? In this blog, I’ll dive into the world of UEFI and explore what it is, how it works, and why it matters.


UEFI, or Unified Extensible Firmware Interface, is the next generation boot system that has been replacing the legacy BIOS (Basic Input/Output System) in most modern computers.

The UEFI system is an interface between the firmware and the operating system, and it provides a more secure, flexible, and user-friendly environment for booting up your computer.

The Background of UEFI

UEFI was developed as a response to the limitations of BIOS, which was created in the 1970s for 16-bit IBM PC systems. As computer technology advanced, BIOS became insufficient for handling the needs of modern computers.

To address these limitations, Intel developed the Extensible Firmware Interface (EFI) in the 1990s, and later, UEFI was formed as an industry standard based on the EFI specification.

UEFI was introduced in 2005 and has been gradually replacing BIOS in most computer systems.

What is UEFI?

UEFI is a firmware interface that serves as the link between the computer’s firmware and operating system. It controls the boot process and provides a graphical user interface (GUI) for configuration.

UEFI provides a more secure and user-friendly environment for booting up your computer, compared to the traditional BIOS.

Features and Benefits of UEFI

Secure Boot

One of the most important features of UEFI is the secure boot, which helps to prevent unauthorized software from running on your computer.

Secure boot is a security feature that verifies the authenticity of the boot loader and operating system before booting up. This helps to prevent malware and rootkits from infecting your computer and compromising your data.

Graphical User Interface

UEFI provides a graphical user interface, which makes it easier for users to interact with the firmware and make configuration changes.

The GUI is more user-friendly and visually appealing compared to the text-based interface of BIOS. This makes it easier for users to understand and navigate the UEFI firmware.

Support for Large Hard Drives

UEFI supports hard drives larger than 2 TB, which is not possible with BIOS. This means that you can use larger hard drives with UEFI without encountering any compatibility issues.

Faster Boot Time

UEFI boot time is faster than BIOS because UEFI uses a different boot process. UEFI supports the use of multiple threads, which allows it to load multiple drivers simultaneously, speeding up the boot process.

Support for 64-Bit Operating Systems

UEFI supports both 32-bit and 64-bit operating systems, while BIOS only supports 32-bit operating systems. This means that you can use a 64-bit operating system with UEFI, which provides better performance and stability compared to a 32-bit operating system.

Support for GPT Partitioning

UEFI supports the use of the GPT (GUID Partition Table) partitioning scheme, which is more advanced and flexible compared to the MBR (Master Boot Record) partitioning scheme used by BIOS.

The GPT partitioning scheme allows for a larger number of partitions and is better suited for large hard drives.

Improved Support for Hardware

UEFI provides better support for hardware compared to BIOS, including support for a wider range of peripherals, such as USB devices, graphics cards, and network adapters.

This makes it easier for users to use newer and more advanced hardware with their computer.


UEFI is the next generation boot system that is gradually replacing the traditional BIOS in modern computers. It provides a more secure, flexible, and user-friendly environment for booting up your computer.

UEFI offers several benefits over BIOS, including faster boot time, support for large hard drives, support for 64-bit operating systems, and improved support for hardware.

If you are buying a new computer, it is likely that it will come with UEFI, which provides a better experience compared to BIOS.

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