Please try to go back to BIOS 0155 and report back.
Thanks for your suggestion, but.....
In the initial phase of the "build" I had BIOS v.0151 installed with the same problem as 156&155.
I have noticed that the Nuvoton CIR Utility program does not show in Programs and Features under the Control Panel. Only one way to un-install is the Nuvoton menu "Uninstall" option.