How to Check for a BIOS Update (and Whether You Actually Need One)

Your BIOS is the firmware that wakes your computer up before the operating system even loads. It initializes your hardware, manages boot sequences, and acts as the bridge between your physical components and your software. Like any firmware, it can receive updates — but checking for and applying a BIOS update is a different process than updating an app or driver. Getting it right matters.

What Is a BIOS Update and Why Would You Need One?

BIOS stands for Basic Input/Output System. On modern computers, it's more accurately called UEFI (Unified Extensible Firmware Interface), though most people still use "BIOS" as a catch-all term.

Manufacturers release BIOS updates to:

• Fix security vulnerabilities (like Spectre/Meltdown mitigations)
• Add support for new CPUs or RAM configurations
• Resolve stability or compatibility bugs
• Improve hardware recognition (new NVMe drives, USB standards, etc.)
• Enable features like Resizable BAR for GPU performance

You don't need to update your BIOS the way you update Windows or macOS. If your system is stable, a BIOS update isn't always necessary — and a failed update can brick a motherboard. That context matters before you start.

Step 1: Find Your Current BIOS Version

Before checking for updates, you need to know what version you're running.

On Windows:

1. Press Windows + R, type msinfo32, and hit Enter
2. In System Information, look for BIOS Version/Date in the right panel
3. Note the version number and date

Alternatively, open Command Prompt and run:

wmic bios get smbiosbiosversion 

On Linux:

Run this in terminal:

sudo dmidecode -s bios-version 

On the BIOS/UEFI screen itself:

Restart your PC and press the firmware key during boot — typically Delete, F2, F10, or Esc depending on your motherboard or laptop brand. The current version is usually displayed on the main screen.

Step 2: Identify Your Motherboard or Laptop Model

BIOS updates are model-specific. You need the exact motherboard model (for desktops) or the exact laptop model number.

For desktops:

• Press Windows + R, type msinfo32 — look for BaseBoard Manufacturer and BaseBoard Product
• Or run in Command Prompt: wmic baseboard get product,manufacturer

For laptops:

• The model number is often printed on the bottom of the device
• In System Information, check System Model
• For Dell, HP, Lenovo, and ASUS, the model number ties directly to the right support page

Step 3: Check the Manufacturer's Support Page

This is where the actual update check happens — and it's non-negotiable. Only download BIOS updates from the official manufacturer's website. Third-party sources are not safe for firmware.

Navigate to your model's Drivers & Downloads section, filter by BIOS/Firmware, and compare the latest available version against the version you recorded in Step 1.

Step 4: Read the Release Notes Before Doing Anything 🔍

Every BIOS update ships with release notes describing what changed. This step is skipped too often.

Check whether the update addresses:

• A specific bug you're experiencing
• A security vulnerability relevant to your setup
• CPU or RAM support for hardware you're adding

If none of the changes apply to your situation, updating may offer no practical benefit while carrying real risk. Knowing why an update exists helps you decide if it's worth proceeding.

How BIOS Updates Are Actually Applied

The method varies by platform:

Manufacturer utility (simplest): Many brands offer Windows-based tools — Lenovo System Update, Dell SupportAssist, ASUS MyASUS, HP Support Assistant — that detect and apply BIOS updates automatically.

UEFI/BIOS built-in updater: Some motherboards include a Q-Flash, EZ Flash, or M-Flash tool directly in the firmware interface. You download the update file, place it on a USB drive, and flash from within the BIOS itself. No OS required.

USB flashing: Download the update file from the manufacturer, copy it to a formatted USB drive, and use the board's built-in flash utility. This is common for desktop motherboards.

Windows-based installer: Some manufacturers package BIOS updates as .exe files that run directly in Windows and apply the update on reboot.

Variables That Affect Your Approach ⚙️

Not everyone should approach a BIOS update the same way:

• Desktop vs. laptop: Desktops using discrete motherboards often have more flashing options; laptops are more locked to manufacturer tools
• Age of the system: Older boards may have limited update utility support; newer boards often have more streamlined processes
• Technical comfort level: Flashing from within UEFI is generally safer than running a Windows-based flasher on an unstable system
• Reason for updating: Chasing a specific fix is different from updating "just because"
• Power reliability: A power loss mid-flash can corrupt firmware permanently — desktop users on battery backups or laptop users with full batteries face less risk

Some boards include BIOS flashback features that allow flashing even without a CPU or RAM installed, which becomes relevant when upgrading to a processor that isn't supported by the current firmware.

What the Right Decision Looks Like Depends on Your Setup

Checking for a BIOS update is a five-minute process once you know your model and current version. Whether the update you find is worth applying — and which method is safest to use — depends heavily on your specific hardware, your reason for looking, and how comfortable you are with the process. The update that's essential for one user's new CPU installation is completely unnecessary for another user running a stable, unchanged system.