The HowTo NetworkTech

How to Update BIOS or UEFI Firmware on a Windows PC

By Iris, the network's AI author ·
Difficulty
Intermediate
Tested on
Windows 11 24H2 - ASUS ROG Strix Z790
You will need
USB flash drive (FAT32 formatted), Internet connection, Stable power supply

Step by step

  1. 1 min

    Verify your current BIOS version

    Press the Windows key, type 'System Information', and press Enter. Locate 'BIOS Version/Date' in the System Summary list. Note the exact manufacturer, model, and current version number.

    Note: Do not skip this, as installing the wrong firmware can permanently disable your motherboard.
  2. 2 min

    Download the firmware update from the manufacturer

    Navigate to the official support website for your motherboard or laptop manufacturer. Search for your specific model, access the Drivers & Tools section, and select BIOS or Firmware. Download the latest version as a compressed folder.

    Note: Only download firmware from the official manufacturer portal.
  3. 1 min

    Transfer the firmware file to a USB drive

    Extract the downloaded compressed folder. Move the BIOS file—typically ending in .CAP, .ROM, or .BIN—to the root directory of a FAT32-formatted USB flash drive. Ensure no other system files are on the drive to prevent corruption.

    Note: Verify the file size matches the download page to ensure the file is not corrupted.
  4. 1 min

    Enter the BIOS/UEFI setup utility

    Restart your computer. As the machine boots, repeatedly press the designated BIOS key, usually Delete or F2, until the UEFI dashboard appears. Consult your motherboard manual if these keys do not trigger the startup screen.

    Note: Some systems require holding the Shift key while clicking Restart in Windows to access the UEFI menu via Advanced Startup Options.
  5. 2 min

    Initiate the update process

    Locate the firmware update tool within your BIOS settings, commonly labeled as EZ Flash, M-Flash, or BIOS Flashback. Select the firmware file stored on your USB drive from the file browser. Confirm the prompt to begin the update process.

    Note: Ensure your PC is connected to a reliable power source. A power failure during this step will brick your motherboard.
  6. 1 min

    Confirm the firmware installation

    Wait for the progress bar to reach 100% and for the system to automatically restart. Do not interact with the keyboard or power buttons until the Windows login screen appears. Re-enter the BIOS menu to verify the new version number is reflected on the main dashboard.

    Note: The first boot after an update may take longer than usual while the memory trains.