How to update your Dell Inspiron 15 5000 Series Bios

For the Dell Inspiron 15 5000 Series bios update, here’s what you’ll do:

First go to the full model page of your device with the Service Tag number found under the computer and download the compatible bios file to your operating system on the driver download page.
The battery of your computer, the charger must be plugged in, and the battery must be at least 20% charged.
Run the downloaded file.
Your computer will restart and you will see the following screen. Your computer will restart after waiting for this screen to shut itself down.