How to Update BIOS on Windows 11: A Simple Step-by-Step Guide

A BIOS or UEFI update replaces system firmware, so the correct procedure comes from the PC or motherboard manufacturer for the exact model. Windows 11 does not provide one universal flashing method for every computer.

Decide Whether the Update Applies

Read the manufacturer's release notes and update recommendation. Reasons can include a security advisory, reliability fix, support for new hardware or a required compatibility change. A PC that appears to work normally can still need a firmware security update; visible faults are not the only reason to install one.

Check prerequisites before downloading. Some systems require an intermediate BIOS version or a related firmware update first, and some updates prohibit rollback. Do not assume the newest file can always be applied directly or reversed later.

Identify the Exact System

Open System Information from Start, or run msinfo32. Record System Manufacturer, System Model and BIOS Version/Date. For a custom-built PC, also check BaseBoard Manufacturer, BaseBoard Product and the physical board revision where the vendor requires it.

For a branded laptop or prebuilt desktop, use that PC manufacturer's support page and model/service identifier. An OEM board can need different firmware from a similarly named retail motherboard. The current BIOS date alone is not enough to select an update.

Prepare Power, Files and Recovery Access

• Back up important files and record relevant firmware settings before beginning.
• Connect the correct AC adapter on a laptop and meet the manufacturer's battery-charge requirement. A universal “fully charged” rule is not a substitute for the model's instructions.
• For a desktop, maintain stable power; use a suitable UPS if available.
• Read the expected update behavior, including any automatic restarts or extended blank screen.
• On a managed PC, follow the organization's firmware-update process.

Close unnecessary applications if the update uses a Windows utility. Do not routinely disable antivirus or other security software. If the tool is blocked, check its source and the manufacturer's specific instructions instead of weakening protection broadly.

Check BitLocker or Device Encryption First

Make sure you can retrieve the recovery key from another device or a secure offline copy before changing firmware. Do not store the only accessible copy on the encrypted PC itself. BIOS or boot-related changes can trigger a recovery prompt.

Follow the manufacturer's instructions for suspending BitLocker protection before the update. Suspension is different from decrypting the drive. After the firmware update and successful Windows startup, verify that protection has resumed; resume it if it remains suspended. Do not clear the TPM as a routine BIOS-update step.

Microsoft documents suspending and resuming BitLocker for firmware changes. ASUS also highlights recovery-key preparation before firmware updates.

Use the Method Your Model Supports

The supported route may be a vendor Windows utility, a Windows-delivered firmware update, a built-in UEFI flashing tool or a dedicated recovery/Flashback feature. These are not interchangeable procedures, and a USB device is not always needed.

For a Windows utility, run the verified package and follow its prompts. The utility may stage the update in Windows and perform the actual flash after restart. Keep power connected and do not use the PC for other work during the update.

For a UEFI USB method, follow the exact preparation instructions. You may need to extract the downloaded archive, use a particular filesystem or partition layout, rename a file, or use a designated USB port. Formatting a USB drive erases its existing contents, so copy anything you need off it first. Do not assume that copying an unextracted ZIP or a Windows .exe updater to a FAT32 stick supplies the correct firmware image.

ASUS's EZ Flash instructions are an example for supported ASUS products, rather than a procedure to apply to every brand. Its Windows-based update guide describes a different supported route.

Let the Update Complete

Start only after confirming that the update identifies the expected model and version. Once flashing begins, do not remove power, force a restart or remove the update media unless the manufacturer explicitly instructs you to do so.

Automatic restarts, a blank display or memory retraining can be part of normal completion on some systems. Wait for the documented process rather than using a generic five-minute timeout. If you suspect a failure, consult the model's recovery guidance before intervening.

Verify the Result

After a successful boot, reopen System Information and compare the installed BIOS version with the intended release. Check any settings the update may have reset, such as boot order, virtualization or memory settings, against the manufacturer's guidance. Confirm that Windows starts and that BitLocker protection is active again.

A firmware update normally does not erase personal files, but that does not replace the need for a backup and recovery-key preparation.

If the PC Does Not Start

Follow the exact model's recovery instructions or contact the manufacturer with the version and observed symptoms. Firmware recovery or dual-BIOS features exist only on supported devices and may require a particular file and procedure.

Clearing CMOS resets firmware settings on supported hardware; it does not reinstall a corrupted firmware image. Removing a motherboard battery for an arbitrary five minutes is not a universal recovery method and can be inappropriate for a laptop. Do not dismantle the PC or clear security-related settings based on a generic article.

Start with the manufacturer's support page, confirm the package and prerequisites, and complete the update using that model's documented method.