Skip to main content

How to Force Update Your Laptop BIOS Without AC Power

Summary: Need to update your Dell BIOS but your power adapter isn't working? We'll show you a simple Windows command that forces the update safely.

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
Check out other resources

Instructions

Sometimes you need to update your Dell laptop's BIOS even when your power adapter isn't working or your battery is low. We understand this can feel tricky, but don't worry – there's a simple solution.

When You Might Need This Method

You may need to force a BIOS update when:

  • Your AC adapter isn't working or available
  • Your laptop battery is dead or removed
  • Windows won't let you update because it can't detect proper power

Quick Steps

Important: For complete BIOS update guidance and the safest methods, visit our comprehensive BIOS support page. This page has everything you need for successful BIOS updates.

Force Flash the BIOS

Duration: 02:16
When available, closed caption (subtitles) language settings can be chosen using the Settings or CC icon on this video player.

Here's the basic process:

  1. Download your BIOS file from Dell's Driver & Downloads website
  2. Save it to your C: drive (makes it easier to find)
  3. Open Command Prompt as administrator
    • Click Start, type "cmd"
    • Right-click "cmd.exe" and select "Run as administrator"
  4. Navigate to your C: drive by typing cd\ and pressing Enter
  5. Run the update by typing biosflashname.exe /forceit and pressing Enter

Replace "biosflashname" with your actual BIOS file name

Need More Help?

BIOS/UEFI updates are important for your computer's performance and security. Choose the update method that works best for you:

For complete step-by-step instructions and troubleshooting help, visit our full BIOS update guide.

Affected Products

G Series, Alienware, Dell Laptops, Dell Plus, Dell Pro, Dell Pro Max, Dell Pro Plus, Dell Pro Premium, Inspiron, Latitude, Dell Pro Rugged, Vostro, XPS, Legacy Laptop Models, Mobile Workstations, Dell Pro Max 14 Premium MA14250 , Dell Pro Max 16 Premium MA16250, Dell Pro Max 16 Plus MB16250, Dell Pro Max 18 Plus MB18250, Dell Pro Max 16 XE MC16250 ...
Article Properties
Article Number: 000134938
Article Type: How To
Last Modified: 02 Sept 2025
Version:  22
Find answers to your questions from other Dell users
Support Services
Check if your device is covered by Support Services.