I have opened a support case and provided details and logs from both my PC's. One works, one doesn't. I sent them the "working" PC logs etc. in hope they can find a "missing link".
Please note in my original post, "I am running Windows 8.1 on both PC's".
The only differences I can really "ID" are, 1. My old PC was Vista, then Windows 7, then Windows 8, then Windows 8.1 and Guitar Port has always worked. It's an E-Machine.
My new PC is an HP Pavilion with Windows 8 out of the box...I upgraded to Windows 8.1, however Guitar Port has not worked for either OS on the new HP.
The the only "Line6" product that does not see the Guitar Port on the new PC is License Manager....
I sent a follow up note to support as like others, I need this resolved.