Download Dell Inspiron 17 3721 System BIOS Update A12

To start downloading Dell Inspiron 17 3721 System BIOS Update A12, please choose one of the links from the list below.

  1. Inspiron 17 3721 System BIOS Update A12: 3721A12.exe

Run the BIOS update utility from Windows environment

  1. Browse to the location where you downloaded the file and double-click the new file.
  2. Windows System will auto restart and update BIOS while system startup screen.
  3. After BIOS update finished, system will auto reboot to take effect.

Run the BIOS update utility from DOS environment if Legacy Boot Mode(Non-Windows users)

  1. Copy the downloaded file to a bootable DOS USB key.
  2. Power on the system, then Press F12 key and Select "USB Storage Device" and Boot to DOS prompt.
  3. Run the file by typing copied file name where the executable is located.
  4. After BIOS update finished, system will auto reboot to take effect.

Run the BIOS update utility from DOS environment if UEFI Boot Mode (Non-Windows users,Load Legacy Option ROM Disabled)

  1. Copy the downloaded file to a bootable DOS USB key.
  2. Power on the system, then go to BIOS Setup by pressing F2 and go to "Boot > Boot List Option".
  3. Change "UEFI" to "Legacy" of Boot List Option.
  4. Go to "Exit > Exit Save Changes" and reboot system.
  5. Press F12, then Select "USB Storage Device" and Boot to DOS prompt.
  6. Run the file by typing copied file name where the executable is located.
  7. After BIOS update finished, system will auto reboot.
  8. Go to BIOS Setup by pressing pressing F2 and go to "Boot > Boot List Option"
  9. Change "Legacy" to "UEFI" Boot Option.
  10. Go to "Exit" > Exit Save Changes and reboot system.

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