* BIOS update recommended in case the system is unstable, or required fixes have been released.
* Incorrect BIOS update has a risk for system brick, therefore follow the guide step-by-step.

The following procedure suitable fitlet2 computers equipped with Intel ApolloLake processors.

BIOS update procedure

  • Download and extract the AFU BIOS Updater Package. It contains the following files:
    • AfuEfix64.efi
    • flash.nsh
    • Shellx64.efi
    • startup.nsh
  • Download and extract the fitlet2 BIOS File flt2.bin¬†(download from below section)
  • Format the USB Disk-on-Key with the FAT32 file system
  • Copy the downloaded files to the formatted Disk-on-Key
  • Connect the Disk-On-Key to the target unit
  • Power up the target unit
  • Press the DEL key during the boot until the BIOS Setup appears
  • Browse to the Save & Exit menu
  • Click on the Launch EFI Shell from filesystem device option
  • The system will boot to the EFI Shell, and after 4 seconds the automatic script will start
  • The script will find the Storage Device with EFI update application
  • Type the following command:¬†flash flt2.bin
  • The BIOS flashing process will start.
  • At the end of the BIOS flashing process, type the following command: reset
  • The system will restart and perform the initialization process.

BIOS Files:


  • Update to BIOS core version FLT2.
  • Linux resume from suspend issue is fixed
  • Windows power button configuration issue is fixed (board rev. 1.2 only)
  • Wake-on-LAN issue is fixed
  • Linux Watchdog (iTCO_wdt module) issue is fixed
  • BIOS menus are revised
  • BIOS menu restore to defaults option is fixed
  • TXE firmware is updated to
  • Download:


  • fitlet2 rev. 1.2 support is added
  • Quite Boot Logo is fixed
  • Evaluation Copy string is removed


  • Fix INTEL-SA-00088 vulnerability. Update of CPU Microcodes to M03506C9_0000002E and M03506CA_00000008