Hi chris_g1....thanks so much for the continued support.
Unfortunately, following your steps as described didn't help.
In System Info, under USB, all I saw on the USB Device Tree was Apple internet keyboard and Bluetooth.
I followed the reset instructions, and there was no change to the System Info.
I do get a window alert on startup 😕 that I do not know what it is, and have failed to mention to you:
Do you want the application "enhanced video.app" to accept incoming network connections?
I always click Deny....I have no need to share my computer with anyone or allow any network to access it.
I am not sure what that is - can I get rid of it?
Many thanks again!