What a BIOS driver is and why you might need one
A BIOS driver is firmware that lets your operating system communicate with your motherboard's basic input/output system. Unlike audio or network drivers that handle specific hardware, BIOS drivers manage core functions: how your CPU talks to memory, how storage devices connect, and how power management works. You typically need to install or update a BIOS driver when you build a new PC, add new hardware like an NVMe drive or additional RAM, or when your motherboard manufacturer releases an update to fix stability issues or add support for newer processors.
The confusion often comes from terminology. What Windows calls a "BIOS driver" is usually a chipset driver — the software layer between Windows and your motherboard's chipset. The actual BIOS firmware itself lives on your motherboard and updates differently. This guide covers installing the chipset driver, which is what most people need when they see a BIOS-related driver missing in Device Manager.
Key Takeaways
- BIOS drivers are chipset drivers that let Windows communicate with your motherboard; you find them on your motherboard manufacturer's support page, not from Windows Update.
- Before installing, identify your exact motherboard model (check System Information or CPU-Z) and read the correct driver version from the manufacturer's website.
- Installation usually means running an executable installer, restarting your computer, and letting Windows detect the driver automatically afterward.
- If Device Manager still shows unknown devices after installation, you may need to manually point Windows to the driver folder or install chipset drivers in a specific order.
- Updating actual BIOS firmware is different from installing a driver and requires a separate process through your motherboard manufacturer's utility.
Identify your motherboard model before downloading
You cannot install the correct driver without knowing your exact motherboard model. Open the Start menu, type "System Information," and press Enter. Look for "BaseBoard Product" — that is your motherboard model. Write it down exactly as it appears. If System Information does not show it clearly, read and run CPU-Z (free, from cpuid.com). Open the Mainboard tab and note the Manufacturer and Model fields.
Why this matters: motherboard manufacturers release different driver versions for different models, even within the same product line. Installing a driver for the wrong model can leave devices unrecognized or cause stability problems. If you built the PC yourself, check the box the motherboard came in or look at the physical board — the model number is usually printed on it.
read the driver from your motherboard manufacturer
Go to your motherboard manufacturer's support website. The major manufacturers are ASUS, MSI, Gigabyte, ASRock, and Intel (for their own boards). Search for your motherboard model in their support section. You will see a Downloads or Drivers page with a list of driver categories. Look for "Chipset" or "BIOS" — these are usually the same thing for driver installation purposes.
Select the driver version that matches your Windows version (32-bit or 64-bit — check by opening Settings, going to System, then About, and looking for "System type"). read the file to your Downloads folder. Do not extract it yet if it comes in a .zip file — many manufacturers' installers handle extraction automatically. If the read page offers both a chipset driver and a "BIOS Update" utility, read only the chipset driver for now. BIOS firmware updates are a separate process and carry more risk if interrupted.
Run the installer and restart
Locate the downloaded file (usually a .exe file) and double-click it. Windows may ask for permission — click "Yes" to allow it to run. The installer will open and guide you through the installation. Most manufacturers' installers straightforward copy files to your system folder and then prompt you to restart. Let the installer restart your computer — do not skip this step, as the driver does not fully load until after the restart.
During restart, your computer may take longer than usual to boot as Windows detects and initializes the new driver. This is normal. Once you are back at the desktop, open Device Manager (right-click the Start button and select Device Manager, or search for it). Expand "System devices" and look for unknown devices or devices with a yellow exclamation mark. If you see any, the driver installation may not be complete.
Handle unknown devices if they remain after installation
If Device Manager still shows unknown devices after the chipset driver installed, Windows may need help finding the driver files. Right-click the unknown device and select "Update driver." Choose "Browse my computer for drivers." Navigate to the folder where the chipset driver was installed — usually C:\Program Files\[Manufacturer]\Chipset or similar. Let Windows search that folder and its subfolders. If it finds a match, it will install it automatically.
If that does not work, the unknown device might be something other than a chipset driver. Take a screenshot of the device name and search online for "[your motherboard model] [device name] driver." Some motherboards have additional management engines or power controllers that need separate drivers. Install those in the order the manufacturer recommends — usually chipset first, then any others.
Distinguish between driver installation and BIOS firmware updates
Installing a chipset driver is not the same as updating your BIOS firmware. The driver is software that runs in Windows. The BIOS is firmware that runs before Windows even starts. If your motherboard manufacturer released a BIOS update to support a newer CPU or fix a bug, you need their BIOS update utility, not the chipset driver. These utilities are usually named something like "BIOS Update Tool" or "M-Flash" (MSI) or "EZ Flash" (ASUS).
BIOS updates carry real risk — if the update is interrupted by a power loss or crash, your motherboard can become unbootable. Only update BIOS if you have a specific reason (CPU compatibility, stability fix) and a stable power supply. If you are unsure whether you need a BIOS update, the chipset driver alone will solve most driver-related issues in Device Manager.
Verify the installation in Device Manager
After installation and restart, open Device Manager again and expand "System devices." You should no longer see unknown devices or yellow exclamation marks. If all devices now have proper names and no warnings, the driver installed correctly. You can also check under "Chipset" or "Motherboard" categories if your version of Windows organizes them that way.
If problems persist, restart your computer one more time — sometimes Windows needs a second restart to fully initialize drivers. If you still see unknown devices after two restarts, note the exact device name and search the manufacturer's support page for that specific device. Some motherboards have components that require drivers not included in the main chipset package.
Frequently Asked Questions
Do I need to uninstall the old BIOS driver before installing a new one?
No. The installer will overwrite the old version automatically. Uninstalling first can sometimes leave orphaned files that cause conflicts. Let the new installer replace the old one directly.
What if my motherboard manufacturer's website does not have a driver for my exact model?
Check that you have the model number exactly right — sometimes similar-looking model numbers have different drivers. If the model truly is not listed, it may be very old or discontinued. Contact the manufacturer's support directly with your model number and Windows version, or try a driver from a very similar model if the chipset is the same.
Can I install a BIOS driver from a USB drive if my internet is down?
Yes. read the driver on another computer, copy it to a USB drive, and transfer it to your PC. Run the installer from the USB drive the same way you would from Downloads. Make sure the driver is for your exact motherboard model and Windows version.
Will installing a BIOS driver improve my computer's performance?
Not noticeably in normal use. A missing or outdated chipset driver can cause stability issues or prevent new hardware from working, but installing it fixes problems rather than adding speed. The main benefit is that your system will run reliably and recognize all connected devices.
Is it safe to install a BIOS driver I downloaded from a third-party website?
No. Always read drivers directly from your motherboard manufacturer's official website. Third-party sites can host modified or malicious versions. The manufacturer's site is the only safe source.