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How to Check if Your Laptop or Computer Support UEFI

Whenever we start a computer system then the first program that comes into play is the BIOS. BIOS stands for 'Basic Input Output System' and it is a non-volatile firmware that initializes the computer hardware during booting. The BIOS loads the boot files required to start the operating system. BIOS is being replaced by UEFI 'Unified Extensible Firmware Interface'. BIOS has limitations as compared to UEFI. The main limitation of it is that it is outdated and only supports MBR (Master Boot Record).

BIOS' Limitations

  • It is outdated and has been around us since 1975
  • BIOS doesn't have a secure boot feature also works for secure boot linux and doesn't check for driver's signatures. As a result malicious code can run during the computer booting process.
  • BIOS only works with the MBR partitioning scheme that only supports a hard drive having a storage capacity not larger than 2TB.
  • You can't have more than 4 partitions on a Windows operating system if MBR is used.
  • BIOS is slow as compared to UEFI.
  • Data corruption can occur if the MBR fails.
  • It is motherboard specific and sometimes doesn't support newer CPUs.

While you are reading this article your computer or laptop may be using the MBR partition table scheme with BIOS. Well there is no problem is using BIOS + MBR if your hard drive size is less than 2TB. But UEFI is the successor to BIOS and provides enhanced security and better performance. It also supports Windows GPT (GUID) partition scheme which lets you create an unlimited number of partitions on a hard drive. 

Here the only limit will be the operating system, for example Windows supports a maximum of 128 partitions. Another advantage of UEFI is that it has CPU independent architecture and CPU independent drivers. It also support remote debugging even if there is no operating system installed on the computer.

How to Check if Your Laptop or Computer Supports UEFI

  • Download and install hardware info from this link.
  • Open HWinFO and click 'RUN'.
  • Under 'CPU' details locate the BIOS date and Version.
  • Here check if UEFI is present in green letters. 
  • If it is present then your computer or laptop supports UEFI otherwise not.

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