How to Update Your BIOS Safely (and When NOT To): a Guide for Desktops and Laptops

🧬 What the BIOS (or UEFI) Is and Why It Gets Updates

The BIOS — now called UEFI on modern computers — is the software stored on a chip on the motherboard. It powers up the hardware, recognizes the processor, memory and drives, and hands control over to Windows. Like any software, it has flaws that manufacturers fix over time.

The difference is the risk: if writing the BIOS is interrupted midway (a power cut, turning off the PC, the wrong file), the board may be unable to start. Many modern boards have protections against this, but not all. So the rule is: update when there’s a reason, and always carefully.

🤔 When It’s Worth Updating (and When It Isn’t)

If your problem is blue screens or restarts, before touching the BIOS rule out the most common causes in blue screen: how to fix it and PC restarting on its own.

📜 How to Read the Release Notes (What Each Term Means)

Every new BIOS comes with a short list of changes, almost always in technical jargon. These are the most common terms and what they mean for you:

If the notes require an intermediate version first (“update to version X first”), follow the order: skipping steps is one of the causes of failed flashes.

🔍 Find Your Motherboard Model and BIOS Version

Without opening the case, run in PowerShell:

Get-CimInstance Win32_BaseBoard | Select-Object Manufacturer, Product
Get-CimInstance Win32_BIOS | Select-Object Manufacturer, SMBIOSBIOSVersion, ReleaseDate
Get-CimInstance Win32_ComputerSystem | Select-Object Manufacturer, Model

Another option is Win + R → msinfo32, then look at “BIOS Version/Date” and “BaseBoard Product”. Write everything down — including the board’s revision, which some brands print on the board itself (e.g. “REV 1.1”).

⬇️ Download the Right Version from the Official Site

1. Go to the official site of your motherboard or laptop maker.
2. Search for the exact model and open Support → Downloads → BIOS.
3. Read the release notes: see what changes and whether there are requirements (e.g. “update to version X first”).
4. Download the latest stable version (avoid “beta” versions unless you have a reason).

🛡️ Prepare the PC Before Flashing

manage-bde -protectors -disable C: -RebootCount 2

I explain why this step matters in BitLocker: where to find the recovery key. And if you don’t have a UPS, see how to choose a UPS for your PC.

💻 Laptops: Use the Brand’s Official App

On laptops and brand-name PCs, the update is usually simple: you run an installer in Windows, the computer restarts and flashes the BIOS by itself. Use the official support app:

Some manufacturers also deliver the BIOS through Windows Update, under optional updates. After you click install, don’t turn off the laptop, even if the screen goes black for a few minutes or the fan speeds up.

🖥️ Motherboards: the Update Tool Inside the BIOS

On custom-built PCs, the safest way is the tool inside the BIOS itself, reading the file from a USB drive:

1. Format a USB drive as FAT32 and copy the BIOS file (extracted from the ZIP) onto it.
2. Restart and enter the BIOS (Del or F2).
3. Open your brand’s update tool (table below) and pick the file on the USB drive.
4. Confirm and wait. The PC may restart more than once by itself.

⏳ What to Do (and Not Do) While It Flashes

On some boards the screen goes black and the fans run at full speed for a while: that’s normal. Only suspect a problem after 20 or 30 minutes with no sign of change.

🔧 After the Update: Reconfigure and Check

1. Enter the BIOS and load optimized defaults (Load Optimized Defaults), if the tool asks.
2. Re-enable memory XMP/EXPO, the boot order and any settings you noted.
3. Confirm that Secure Boot and the TPM are still on (Windows 11 needs them).
4. Start Windows and check the new version:

Get-CimInstance Win32_BIOS | Select-Object SMBIOSBIOSVersion, ReleaseDate
Confirm-SecureBootUEFI

The second command should reply True. If your memory got slower, it’s usually just XMP turned off again — see DDR4 vs DDR5 to understand your kit’s correct speed.

🆘 The Board Won’t Start After the Update

1. Don’t panic or start pressing buttons: leave it off for a few minutes.
2. Try BIOS Flashback (if the board has it) with the correct version on a USB drive.
3. Boards with Dual BIOS (common on Gigabyte) recover by themselves from the backup chip.
4. Do a Clear CMOS (jumper or button on the board, or remove the battery for a few minutes with the PC unplugged).
5. If nothing works, the board needs the chip reprogrammed at a repair shop — it’s fixable, but it costs money.

Signs of a faulty board unrelated to the BIOS are in faulty motherboard: warning signs.

✅ Final Checklist Before Clicking “Update”

With all eight items ticked, the risk is very low. If one is missing, leave it for another day — the old BIOS has worked until today and will work another week.

🤔 BIOS Myths

FAQ