Dell updating bios
Unlike the operating system, the BIOS is low-level software that is stored on a chip on the motherboard of the computer.
In order to update this low-level software, you normally have to “flash the BIOS“, which will replace the old software with the new version.
For example, a BIOS update from Dell will be packaged into an executable file that will not only check to make sure the version of the BIOS you are installing is compatible with your system, but will also go ahead flash the BIOS without you having to manually do it.
If you decide there is an update you would like to install, there are several possible ways. This file will usually explain exactly what you need to do to perform the upgrade.