This guide is for anyone with a Dell laptop or desktop at home, in a shop or in an office who has never opened the BIOS (the small program that starts the computer before Windows loads) and wonders whether they should. By the end you will know how to see your current BIOS version, how to find the update Dell offers for your model, and a simple four-times-a-year routine that takes about fifteen minutes.
How often should I update my Dell laptop BIOS?
Short answer: Check about once every three months, and install an update when Dell lists one for your exact model. You do not need to chase every small release. A quarterly look is a reasonable way to catch the BIOS and Wi-Fi security notices Dell publishes, and it keeps the update from being a rushed job done during a power cut.
Why check at all? What Dell has published this year
A BIOS update is a small fix written by the maker, often for security or stability. Dell lists such fixes in numbered security advisories on its support site. Three from 2026 are a good example of what a quarterly check looks for. Each is a routine notice with a routine remedy: update.
Your laptop may not be on any of these lists. That is normal. Dell's own advisory pages, such as the one for DSA-2026-195, name the affected models, so check the list rather than assume.
How do I see what I have and what Dell offers?
Step 1: Read your current BIOS version
- Press the Windows key and R, type msinfo32 and press Enter.
- On the System Summary page, find BIOS Version/Date and note it down.
Step 2: Find your Service Tag
The Service Tag is a short letters-and-numbers code printed on a sticker under the laptop or shown on the BIOS start screen. It tells Dell exactly which model and parts you have.
Step 3: Look up the update
Open Dell's support site, enter the Service Tag and open the Drivers and Downloads section. Look at the BIOS entry and the Wi-Fi driver entry. If the BIOS version there is newer than the one you noted, read Dell's short description. Many Dell laptops also carry Dell's own update tool, SupportAssist or Dell Command Update, which can offer the same updates automatically. The wording can differ slightly between versions.
Before you press install
- Plug in the charger and leave it connected for the whole update. Do not switch the laptop off or press the power button while the BIOS update is running. The screen may go blank and the fan may spin up for several minutes; that is normal.
- Save your BitLocker recovery key (Windows' built-in drive lock key) somewhere other than the laptop. A BIOS change can bring up a recovery screen on some laptops. Our guide to updating a laptop BIOS safely covers this.
- Close your work, and copy important files such as accounts or assignments to a pen drive.
- Do one update at a time and restart when asked.
What is a good quarterly routine?
Pick four easy dates: the first week of January, April, July and October. On each date, spend fifteen minutes on the steps above. Note the BIOS version in a diary or phone note. If nothing newer is offered for your Service Tag, close the page and do nothing else. That is a complete check. If you are unsure how to reach the BIOS screen itself, see how to enter BIOS on any laptop.
Power cuts and patchy broadband during Dell updates
Power cuts and voltage dips are a practical risk with any BIOS update. A laptop on a weak supply can lose power halfway through, and that can leave it unable to start. Choose a time when the supply is steady, and use a UPS (a small battery backup) for a desktop. Large Wi-Fi driver downloads can also fail on a patchy broadband line, so let them finish rather than switch networks halfway. If a Dell laptop will not start after an update, we accept laptops by courier from anywhere in India.
When to get help
- The laptop shows a black screen for more than fifteen minutes after a BIOS update began.
- A BIOS update was interrupted by a power cut or a restart.
- A BitLocker recovery screen appears and you do not have the key.
- The Dell support page names several BIOS versions and you cannot tell which one fits your laptop.
Our BIOS repair and update service and our Dell laptop service page cover these cases. In Hyderabad we can visit you through our doorstep service. The charge is ₹149 doorstep visit fee, waived when you approve laptop repair with us. If you would like the check done for you every year, our annual care plan is an option.
A note from the LRW Engineer Team
Treat the BIOS like a fire extinguisher check: look at it on a schedule, and leave it alone in between. If your laptop is running well and Dell has no newer version for your Service Tag, you have nothing to do. When there is one, do it on a steady power supply, not between two meetings.