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Dell Vostro 5471 Owners's Manual

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Flashing the BIOS from the F12 One-Time boot menu

Updating your system BIOS using a BIOS update .exe file copied to a FAT32 USB key and booting from the F12 one time boot menu.

BIOS Update

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 FLASH UPDATE is listed as a boot option for your system. If the option is listed, then the BIOS supports this BIOS update option.

NOTE Only systems with BIOS Flash Update option in the F12 One-Time Boot Menu can use this function.
Updating from the One-Time Boot Menu

To update your BIOS from the F12 One-Time boot menu, you will need:

  • USB key formatted to the FAT32 file system (key does not have to be bootable)
  • BIOS executable file that you downloaded from the Dell Support website and copied to the root of the USB key
  • AC power adapter connected to the system
  • Functional system battery to flash the BIOS

Perform the following steps to execute the BIOS update flash process from the F12 menu:

CAUTION Do not power off the system during the BIOS update process. Powering off the system could make the system fail to boot.
  1. From a power off state, insert the USB key where you copied the flash into a USB port of the system .
  2. Power on the system and press the F12 key to access the One-Time Boot Menu, Highlight BIOS Update using the mouse or arrow keys then press Enter.
    Screen 1
  3. The Bios flash menu will open then click the Flash from file.
    Screen 2
  4. Select external USB device
    Screen 3
  5. Once the file is selected, Double click the flash target file, then press submit .
    Screen 4
  6. Click the Update BIOS then system will reboot to flash the BIOS.
    Screen 5
  7. Once complete, the system will reboot and the BIOS update process is completed.

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