...
Update:
AfuEfix64.efi YOUR_BIOS_SIGNED_IMAGE.BIN /P /B /K /CAPSULE
Example:
AfuEfix64.efi BIOS_BDV3000_V21_SIGNED.BIN /P /B /K /CAPSULE
press y to restart the system
In BIOS environment set:
Reset NVRAM: Enabled
Boot Block Update : Enabled
Select “Proceed with flash update“
After the update is finished, press any key to reboot the system