Since the BIOS Source Code was leaked along with the keys in the BIOS,
a computer security tech said to change BIOS settings on the Gigabyte BRIX to UEFI settings for everything. Then install Windows 8.1 and let Microsoft replace the "BIOS" with its own UEFI controls..and keys.
This appears to be the only remedy for security since American Megatrends source code for their bios was leaked online.
Gigabyte should step up and either recall the effected products, push out a patch the change the BIOS to remove the source code that's now in the hands of the Chinese, Russians, Iran, and others...... or give everyone a new Microsoft 8.1 install disc to remedy the security issue.
Installing Microsoft 8.1 in UEFI mode overwrites the compromised source code.