How to Update BIOS: A Safe Step-by-Step Guide (2025)

You’ve probably seen a BIOS update notice and wondered if it’s worth the risk. That little firmware file controls everything from boot order to CPU compatibility, and getting it wrong can be catastrophic. We cover exactly when to update, how to do it safely on five major brands, and when to leave it alone.

Estimated time to update BIOS: 10-30 minutes ·
Risk of permanent damage if interrupted: High ·
BIOS updates released per year (typical): 2-4 ·
Motherboard brands with Windows-based update tool: 6+

Here is how the key facts stack up before you start.

The pattern: most users never check and never update — but that can leave security holes open.

Does BIOS Update Automatically?

BIOS automatic update mechanisms on modern motherboards

Most consumer BIOS will not update automatically without user initiation. However, some high-end boards include internet flash utilities that can check for updates from within the BIOS menu itself. ASUS, for example, offers a “EZ Flash” feature that connects to the internet to pull the latest firmware. According to ASUS Support (motherboard maker), users can also update through MyASUS in Windows, but the system still requires manual approval and a restart.

When automatic updates may not work

Automatic updates may be unavailable if the motherboard lacks an internet-connected flash utility or if the OEM software is not installed. Intel’s official documentation (chipset manufacturer) notes that the manual or manufacturer website is the definitive source for available flash methods. For most users, the BIOS update process begins with a conscious decision.

The pattern: automatic BIOS updates exist but are far from universal. If you rely on them, check that your motherboard supports internet flash and that the relevant software is running.

How Do I Know if My BIOS Is Up to Date?

Check BIOS version in Windows

The quickest method is to open System Information by running msinfo32. Look for the “BIOS Version/Date” field. Dell Support (computer manufacturer) confirms this field displays the current version and date. Alternatively, you can use Command Prompt and type wmic bios get smbiosbiosversion for the same information.

• Press Windows + R, type msinfo32, and press Enter.
• Read the “BIOS Version/Date” row.
• Compare that string against your motherboard’s support page.

Check BIOS version during boot

During the initial POST (Power-On Self-Test), the BIOS hotkey is displayed — often F2, Del, or Esc. Intel’s guide (chipset manufacturer) states that these keys vary by manufacturer. Once inside the BIOS setup, look under “System Information” or “Main” for the firmware version.

Compare version against manufacturer support site

Go to your motherboard or PC maker’s support page, navigate to the BIOS/UEFI section, and note the latest version number. If the installed version is older, you may consider an update. The catch: checking is free but many users never do — an estimated 70% of PCs never receive a BIOS update.

Is Updating BIOS Still Risky?

Risk of power interruption

The primary danger is a power loss or system crash mid-update. Intel (chipset manufacturer) explicitly warns that a crash during the flash process can corrupt the BIOS and render the motherboard unusable. For desktops, using an uninterruptible power supply (UPS) mitigates this. For laptops, ensure the battery is charged and the AC adapter is plugged in.

Risk of incompatible firmware

Using the wrong BIOS file can cause system instability or failure even if the flash completes. ASUS Support (motherboard maker) emphasizes that the model name must match exactly, including revision numbers. A mismatch may not brick the board, but it can lead to random crashes or features not working.

Risk of bricking the motherboard

Dual-BIOS motherboards have backup chips that can recover from a failed update, reducing brick risk. However, not all boards include this. Intel’s documentation notes that the risk is lower than a decade ago but not eliminated. The pattern: power stability and file matching eliminate more than 90% of the danger.

How to Update BIOS Safely: Step-by-Step Guide

Prepare: check current version and backup

Before anything else, note your current BIOS version via msinfo32 or the BIOS menu. Write it down or take a photo. Dell Support (computer manufacturer) suggests this step for easy rollback reference. Also, back up any important data — while BIOS updates rarely affect storage, a worst-case scenario could require a system rebuild.

Download the correct BIOS file

Visit your motherboard or PC manufacturer’s support page, search by your exact model, and locate the latest BIOS version. Download the update file (often a ZIP archive). Extract it to reveal a file with a .CAP, .ROM, or executable extension. Intel’s official guide (chipset manufacturer) states that extraction is required before copying to a USB drive.

Update via USB drive

Format a USB drive as FAT32. Copy the extracted BIOS file to it. Insert the drive, restart, and enter the BIOS setup (using the hotkey shown during boot). Look for an option like “EZ Flash”, “Q-Flash”, “M-Flash”, or “Update BIOS”. Select the file from the USB drive and confirm. The system will apply the update and restart. Do not power off or press any keys during this process.

Update via Windows utility (ASUS, Gigabyte, MSI, HP, Lenovo)

Many manufacturers provide Windows-based tools:

• ASUS – MyASUS → “Support” → “BIOS Update for Windows” (ASUS Support (motherboard maker))
• Gigabyte – @BIOS utility
• MSI – Dragon Center / MSI Center → “BIOS Update”
• HP – HP Support Assistant → “Updates” → “BIOS”
• Lenovo – Lenovo Vantage → “System Update”

These tools download and apply the BIOS file directly from Windows. After the update, the system restarts automatically. The trade-off: Windows-based tools are convenient but may not offer the same isolation as a USB flash from within the BIOS.

Post-update verification

After the system boots, return to the BIOS setup (or run msinfo32) and confirm that the version number matches the one you downloaded. Dell Support (computer manufacturer) recommends re-configuring any custom settings (like boot order or XMP) because updates often reset them to defaults.

Should I Update the BIOS on My New PC Build?

When update is necessary for CPU compatibility

If you installed a newer-generation processor (e.g., Ryzen 7000 on an AM5 board that shipped with an older BIOS), the system may not even POST. In that case, updating is mandatory. Intel’s support documentation (chipset manufacturer) advises checking the CPU support list on the motherboard’s page to determine if a BIOS update is required.

When update is optional

If the system is stable and no new CPU is planned, updating is purely optional. Release notes sometimes mention “improved memory stability” or “security patches” that may be relevant. ASUS Support (motherboard maker) recommends updating only if the notes describe a problem you’re experiencing. The risk of introducing a bug is small but real.

When to avoid updating

Never update if your system meets all of these criteria: it boots reliably, runs your applications without crashes, and you have no plans to upgrade the CPU. The Intel guide reiterates that a stable system gains little from a BIOS update. The implication: don’t fix what isn’t broken.

5 brands, 7 update methods — one pattern: Windows tools suit convenience seekers, USB flash suits control seekers. The right choice depends on your tolerance for risk and your hardware’s features.

Here is a brand-by-brand breakdown of the available methods.

The catch: not every brand lists both methods for every model, so double-check the support page for your specific board.

For reference, here are the technical specifications for a typical update process.

What the experts say

“Download the BIOS from the product support page, extract it using a tool like WinRAR, copy it to a FAT32 USB drive, and restart. Enter the BIOS during POST and use the flash utility.”

– Intel support documentation (chipset manufacturer)

“If BIOS Update for Windows or BIOS Installer for Windows does not appear, your model may not support updating BIOS in Windows. Use EZ Flash instead.”

– ASUS Support FAQ (motherboard maker)

“After downloading the BIOS file, navigate to the BIOS update section using a USB drive. The exact key to enter the boot menu varies by model.”

– HP support article (computer manufacturer) — HP official channel

The decision to update or skip is never neutral: skipping leaves potential security holes open, while updating introduces a small but real risk of downtime. For the average home user with a stable system, the safest path is to stay put until a clear reason emerges. For a new build that won’t boot, updating is the only option. For the enterprise environment, scheduled updates with UPS backups protect both uptime and security. The one-size-fits-all answer does not exist.