Updating your system BIOS using a BIOS update .exe file that is copied to a FAT32 USB key and booting from the F12 one time boot menu.
You can run the BIOS update file from Windows using a bootable USB key or you can also update the BIOS from the F12 One-Time boot menu on the system.
Most Dell systems built after 2012 have this capability and you can confirm by booting your system to the F12 One-Time Boot Menu to see if BIOS UPDATE is listed as a boot option for your system. If the option is listed, then the BIOS supports this BIOS update option.
To update your BIOS from the F12 One-Time boot menu, you need:
Perform the following steps to run the BIOS update flash process from the F12 menu: