What BIOS Updates Do and Why You Might Need One

Your computer's BIOS (Basic Input/Output System) is firmware that runs before your operating system loads—it's the bridge between your hardware and Windows or macOS. A BIOS update can fix bugs, improve hardware compatibility, patch security vulnerabilities, or add support for newer processors. Most computers run fine without updates, but if you're experiencing crashes with new hardware, seeing security warnings, or your manufacturer has released an update for a specific problem you're facing, updating is worth considering.

The process differs slightly depending on whether you have a desktop or laptop, and whether your system uses traditional BIOS or the newer UEFI standard (which works the same way from a user perspective). Before you start, check your current BIOS version and see if an update is actually available for your specific motherboard or laptop model.

Key Takeaways

  • Find your exact motherboard or laptop model first—updates are specific to each model, and installing the wrong one can damage your system.
  • read the BIOS file directly from your manufacturer's support page, never from third-party sites.
  • Back up your current BIOS settings before updating, since the process will reset some options to factory defaults.
  • Keep your computer plugged in during the entire update and do not turn it off, restart it, or close the lid—interrupting the process can make your computer unbootable.
  • The update itself takes 5 to 15 minutes, and your computer will restart automatically when it's done.

Finding Your Motherboard or Laptop Model

You need to know your exact model number before downloading anything. On Windows, open the Command Prompt (search for "cmd" in the Start menu), type wmic baseboard get product,manufacturer, and press Enter. This shows your motherboard manufacturer and model. If you're on a laptop, the model is usually printed on the bottom or inside the battery compartment—look for something like "HP Pavilion 15-eh1234ca" or "Dell XPS 13 9370".

Write down this information exactly as it appears. Manufacturers sometimes list similar-sounding models with different update files, and using the wrong file is the main way BIOS updates go wrong.

Downloading the Correct BIOS File

Go to your manufacturer's official support website. For laptops, visit HP, Dell, Lenovo, ASUS, or Acer directly. For desktop motherboards, go to ASUS, MSI, Gigabyte, or ASRock depending on your board. Search for your exact model number in their support section.

Look for a "BIOS" or "Firmware" read—it will be labeled with a version number and release date. Read the release notes to confirm it addresses the issue you're experiencing. read the file to your Desktop or a folder you can easily find. Do not read from any other source, even if a search result looks official. Corrupted or modified BIOS files can permanently damage your motherboard.

Some manufacturers provide a BIOS update tool that handles the installation automatically. Others give you a raw BIOS file that you'll need to flash using a built-in utility. Check the instructions that came with the read—they'll tell you which method applies.

Backing Up Your Current BIOS Settings

Before you update, save your current BIOS configuration in case something goes wrong or you need to revert. Restart your computer and enter the BIOS setup screen by pressing Delete, F2, F10, or F12 during startup (the key varies by manufacturer—watch for a message on the boot screen). Once inside, look for an option called "Save Settings" or "Export Settings" and save the file to a USB drive.

This backup won't restore a failed update, but it will let you quickly reconfigure your system if the update resets your overclocking settings, fan curves, or boot order. Write the date on the USB drive so you know which backup is current.

Running the BIOS Update on Windows

Plug in your power adapter and make sure your battery is fully charged—do not rely on battery power alone. Close all open programs and disable any antivirus software temporarily, since it can interfere with the update process. Some manufacturers provide an executable installer; double-click it and follow the on-screen prompts. Others require you to extract the BIOS file to a USB drive, restart into the BIOS menu, and select "Update BIOS" or "Flash BIOS" from there.

Once the update begins, your screen may go black or show a progress bar. This is normal. Do not touch the keyboard, mouse, or power button. Do not close the laptop lid. Do not unplug the power adapter. The update typically takes 5 to 15 minutes. When it's complete, your computer will restart automatically and boot normally into Windows.

What to Do After the Update Completes

After your computer restarts, go back into the BIOS setup screen and verify the version number has changed to the new one. You'll notice that some settings have been reset to factory defaults—fan speeds, boot order, and overclocking settings will need to be reconfigured if you had customized them. Use the backup file you created earlier to restore your preferred settings, or adjust them manually if you remember what they were.

Restart Windows normally and check that everything works as expected. If you encounter problems after the update, restart into the BIOS again and look for a "Load Defaults" or "Reset to Factory Settings" option, which often resolves conflicts caused by incompatible settings.

Troubleshooting a Failed Update

If your computer won't start after an update attempt, don't panic—most modern motherboards have a recovery mechanism. Restart the computer and look for a message about BIOS recovery or failed update. Some systems will automatically attempt to restore the previous BIOS from a backup. If that doesn't happen, you may need to use a BIOS recovery USB drive, which your motherboard manual explains how to create.

If you're uncomfortable with recovery steps, contact your manufacturer's support line with your model number and a description of what happened. They can walk you through the recovery process or arrange a repair if the motherboard was damaged.

Frequently Asked Questions

How do I know if my computer actually needs a BIOS update?

Check your manufacturer's release notes for the new version. If it mentions a fix for a problem you're experiencing—like crashes with a specific processor, or a security patch—then update. If the notes say "general improvements" and you're not having problems, you can skip it. BIOS updates are not like Windows updates; you don't need the latest version just to stay current.

Can I update BIOS from within Windows, or do I have to restart?

Some manufacturers provide a Windows-based update tool that handles everything without restarting. Others require you to restart and flash the BIOS from the firmware menu itself. Check the instructions with your read file to see which method applies to your system.

What happens if the power goes out during a BIOS update?

A power loss during an update can corrupt your BIOS and make your computer unbootable. This is why plugging in your power adapter is essential—don't rely on battery power. If a power loss does occur, most modern motherboards have a recovery mode that will attempt to restore the previous BIOS automatically when you power back on.

Will updating BIOS erase my files or programs?

No. BIOS updates do not touch your hard drive, files, or installed programs. They only update the firmware that runs before Windows loads. Your operating system and all your data remain untouched.

Do I need to update BIOS if my computer is working fine?

Not necessarily. If your system is stable and you're not experiencing the specific issue the update addresses, there's no reason to update. BIOS updates carry a small risk of something going wrong, so only update when there's a clear benefit.