How to Update Your PC's BIOS: Step-by-Step Instructions

What BIOS updates do and when you need one

Your BIOS (Basic Input/Output System) is the firmware that runs before Windows or any other operating system loads. It controls how your hardware communicates with your motherboard. A BIOS update can fix bugs, improve stability, add support for newer processors, or patch security vulnerabilities. Most people do not need to update their BIOS unless they are experiencing a specific problem, installing a new CPU, or their manufacturer has released a security patch.

Before you start, check whether an update is actually necessary. Visit your motherboard manufacturer's support page (ASUS, MSI, Gigabyte, ASRock, or whoever made your board), enter your exact model number, and look at the release notes for the latest BIOS version. If the notes mention a fix for something you are experiencing or a security issue that affects you, proceed. If your system is running fine, there is no reason to update.

Key Takeaways

Find your motherboard model by opening System Information on Windows or checking your motherboard documentation, then read the correct BIOS file from the manufacturer's website.
Create a bootable USB drive using the manufacturer's BIOS update tool or a general tool like Rufus, which takes about 10 minutes.
Plug in the USB drive, restart your PC, and enter the BIOS setup menu (usually by pressing Delete, F2, or F12 during startup), then use the built-in flash utility to install the update.
Do not turn off your PC or unplug it during the BIOS update, as a failed update can make your motherboard unusable.
The update process takes 5 to 15 minutes, and your PC will restart automatically when it is finished.

Finding your motherboard model and downloading the BIOS file

You need to know your exact motherboard model before you can read the right BIOS file. On Windows, press the Windows key and type "System Information," then open it. Look for the line labeled "BaseBoard Product" — that is your motherboard model. Write it down exactly as it appears.

Go to your motherboard manufacturer's support website. ASUS boards go to asus.com/support, MSI boards to msi.com/support, Gigabyte to gigabyte.com/support, and ASRock to asrock.com/support. Search for your exact model number, find the Downloads section, and look for BIOS files. read the latest version to a folder on your desktop. Do not extract or modify the file — leave it as is.

Creating a bootable USB drive for the BIOS update

You will need a USB drive with at least 1 GB of free space. Many motherboard manufacturers provide their own BIOS update tool that can create a bootable USB automatically. Check the support page where you downloaded the BIOS file — there is often a separate read labeled "BIOS Update Utility" or "Flash Tool." read and run that tool, select your USB drive, and let it create the bootable drive. This usually takes 5 to 10 minutes.

If your manufacturer does not provide a tool, use Rufus, which is free and works with any BIOS file. read Rufus from rufus.ie, plug in your USB drive, open Rufus, select your USB drive from the Device dropdown, click Select under Boot Selection, and choose the BIOS file you downloaded. Leave all other settings at their defaults, click Start, and wait for the process to finish. When it is done, safely eject the USB drive.

Entering BIOS setup and starting the update

Plug the USB drive into your PC and restart it. when ready start pressing the BIOS entry key repeatedly — this is usually Delete, F2, F10, or F12, depending on your motherboard. You will see a message on the startup screen telling you which key to press. If you miss it, restart and try again. You should see the BIOS setup menu, which looks like a blue or gray screen with text menus.

Look for a menu option labeled "Update BIOS," "Flash BIOS," "Load BIOS from USB," or something similar. The exact wording varies by manufacturer. Select it, and the BIOS utility will scan your USB drive for the BIOS file. When it finds the file, it will ask you to confirm. Select Yes or Proceed. Do not turn off your PC or unplug it from this point forward — a power loss during the update can permanently damage your motherboard.

Waiting for the update to complete

The BIOS update will begin, and you will see a progress bar. This process takes 5 to 15 minutes depending on your motherboard. Your screen may go black or show a spinning indicator — this is normal. You may hear your fans spin up as the system works. Leave everything alone and do not touch the keyboard or mouse.

When the update finishes, your PC will restart automatically. You may see a message saying "Update Successful" or the system may straightforward reboot. Let it boot all the way into Windows. Once you are back at your desktop, you can remove the USB drive. Your BIOS has been updated.

Verifying the update and resetting settings if needed

To confirm the update worked, restart your PC and enter the BIOS setup menu again using the same key you pressed before. Look for a line that shows the BIOS version or date. Compare it to the version number of the file you downloaded — they should match. If they do, the update was successful.

Some BIOS updates reset your settings to factory defaults. If your PC behaves differently after the update — for example, if it is running slower or certain features are disabled — restart and enter BIOS setup again. Look for an option to load "Optimized Defaults" or "Load Setup Defaults," select it, save, and exit. This restores sensible default settings. If you had customized settings before (like overclocking or disabling certain devices), you may need to reconfigure them.

Common mistakes to avoid

The most dangerous mistake is interrupting the update. Do not restart your PC, unplug it, or press any keys while the update is running. Even a brief power loss can corrupt your BIOS and make your motherboard unusable. If you are worried about power, plug your PC into an uninterruptible power supply (UPS) before you start.

Another common error is downloading the wrong BIOS file for your motherboard model. ASUS, for example, makes dozens of models with similar names — an update for an ROG STRIX B550-E is not the same as one for a ROG STRIX B550-F. Double-check the model number three times before you read. If you are unsure, contact the manufacturer's support team before proceeding.

Do not update your BIOS unless you have a specific reason. If your system is stable and you are not experiencing problems, there is no benefit to updating, and there is always a small risk that something goes wrong. Only update if the release notes mention a fix you need or a security issue that affects you.

Frequently Asked Questions

What happens if the BIOS update fails?

If the update fails, your PC will usually restart and show an error message. Some motherboards have a recovery feature that automatically restores the previous BIOS version. If that does not happen, you may need to contact the manufacturer's support team or take your PC to a repair shop. This is rare, but it is why you should never interrupt the update.

Can I update my BIOS from within Windows?
Some manufacturers offer Windows-based BIOS update tools, but the USB method is safer because it does not rely on Windows or drivers. If your manufacturer provides a Windows tool and you want to use it, follow their instructions exactly. The USB method is the most reliable approach.

Do I need to unplug my PC before updating the BIOS?

No, just make sure it is plugged into power. Your PC needs electricity to complete the update. If you are worried about a power outage, use an uninterruptible power supply (UPS) to protect against sudden loss of power.

How often should I update my BIOS?

Only when necessary. Check your motherboard manufacturer's support page once or twice a year to see if there are security updates or fixes for problems you are experiencing. Most people never need to update their BIOS after their PC is built and stable.

Will updating my BIOS erase my files or Windows?

No. A BIOS update only changes the firmware on your motherboard. Your hard drive, files, and Windows installation are not affected. After the update, everything will be exactly as it was.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.