How to Check Your BIOS Version and Update it

bios-update

You probably shouldn’t update your BIOS, but sometimes you need to. Here’s how to check what BIOS version your computer is using and flash that new BIOS version onto your motherboard as quickly and safely as possible.

Be very careful when updating your BIOS! If your computer freezes, crashes, or loses power during the process, the BIOS or UEFI firmware may be corrupted. This will render your computer unbootable — it’ll be “bricked.”

How to Check Your BIOS Version in Windows

Your computer’s BIOS version is displayed in the BIOS setup menu itself, but you don’t have to reboot to check this version number. There are several ways to see your BIOS version from within Windows, and they work the same on PCs with a traditional BIOS or a newer UEFI firmware.

To use a command, open a Command Prompt window — press Windows Key + R, type cmd into the Run dialog, and press Enter. Run the following command:

wmic bios get smbiosbiosversion

You’ll see the version number of the BIOS or UEFI firmware in your current PC.

find-bios-version-from-command-prompt

You can also find your BIOS’s version number in the System Information window. On Windows 7, you can search the Start menu for System Information to find it. On Windows 8, it’s more hidden — but you can still launch the System Information panel on Windows 8.

The BIOS version number is displayed on the System Summary pane. Look at the BIOS Version/Date field.

find-bios-or-uefi-version-in-windows-system-information

How to Update Your BIOS

Different motherboards use different utilities and procedures, so there’s no one-size-fits-all set of instructions here. However, you’ll perform the same basic process on all motherboards.

First, head to the motherboard manufacturer’s website and find the Downloads or Support page for your specific model of motherboard. You should see a list of available BIOS versions, along with any changes/bug fixes in each and the dates they were released. Download the one you want to update to. You’ll probably want the newest BIOS version unless you want an older one for a specific reason.

If you purchased a pre-built computer, head to the computer manufacturer’s website, look up the computer model, and look at its downloads page. You’ll find any available BIOS updates there.

download-updated-bios

Your BIOS download probably came in an archive — usually a .zip file. Extract the contents of that file. You’ll find some sort of BIOS file — in the screenshot below, it’s the E7887IMS.140 file.

The archive should also contain a README file that will walk you through updating to the new BIOS. You should check out this file for instructions that apply specifically to your hardware, but we’ll try to cover the basics that work across all hardware here.

bios-archive

You’ll need to choose one of several different types of BIOS-flashing tools depending on your motherboard and what it supports. The BIOS update’s included README file should recommend the ideal option for your hardware.

Some manufacturers offer a BIOS-flashing option in their BIOS, or as a special key-press option when you boot the computer. You copy the BIOS file to a USB drive, reboot your computer, and enter the BIOS or UEFI screen. From there, you choose the BIOS-updating option, select the BIOS file you placed on the USB drive, and the BIOS updates to the new version.

You generally access the BIOS screen by pressing the appropriate key while your computer boots — it’s often displayed on the screen during the boot process and will be noted in your motherboard or PC’s manual. Common BIOS keys include Delete and F2. The process for entering a UEFI setup screen on a Windows 8 PC is a bit different.

bios-menu

There are also more traditional DOS-based BIOS-flashing tools. You’d create a DOS live USB drive and copy the BIOS-flashing utility and BIOS file to that USB drive. You’d then reboot your computer and boot from the USB drive. In the minimal DOS environment, you’d run the appropriate command — often something like flash.bat BIOS3245.bin — and the tool would flash the new version of the BIOS.

The DOS-based flashing tool is often provided in the BIOS archive you download from the manufacturer’s website, although you may have to download it separately. Look for a file with the .bat or .exe file extension.

In the past, this process was performed with bootable floppy disks and CDs. We recommend a USB drive because it would probably be the easiest method on modern hardware.

run-dos-program-from-a-bootable-usb-drive

Some manufacturers provide Windows-based flashing tools, which you run on the Windows desktop to flash your BIOS and then reboot. We don’t recommend using these, and even many manufacturers who provide these tools usually caution against using them. For example, MSI “strongly recommends” using their BIOS-based menu option instead of their Windows-based utility in the README file of the sample BIOS update we downloaded.

Flashing your BIOS from within Windows can result in more problems. All that software running in the background — including security programs that may interfere with writing to the computer’s BIOS — could cause the process to fail and corrupt your BIOS. Any system crashes or freezes could also result in a corrupted BIOS. It’s better to be safe than sorry, so you should use a BIOS-based flashing tool or boot to a minimal DOS environment to flash your BIOS.

windows-bios-flashing-utility


That’s it — after you run the BIOS-flashing utility, you’ll reboot your computer and immediately begin using the new BIOS or UEFI firmware version. If there’s a problem with the new BIOS version, you may be able to downgrade it by downloading an older version from the manufacturer’s website and repeating the flashing process.

Image Credit: Kal Hendry on Flickr, Robert Frelberger on Flickr

Chris Hoffman is a technology writer and all-around computer geek. He's as at home using the Linux terminal as he is digging into the Windows registry. Connect with him on Google+.