I have an Optiplex 9020, i7-4770, mini-tower running Windows 10 Enterprise 64-bit, feature update 1903, that shows an Intel AMT SOL (COM3) Error Code 43 under Ports in Device Manager.  I've installed the latest BIOS update, A25, and the latest Intel ME chip set drivers, 11.7, but the error persists. I've tried popping the coin battery and flashing the BIOS from a USB drive and installing the drivers.  I've wiped the computer and re-installing Windows 10 and the error is persists.  I've run Support Assist and checked the hardware and no problems found.  Any suggestions on what to try next would be appreciated.

Thanks in advance.