Hi Bill,
Funny your setup sounds almost identical to mind. For my observatory PC, I also run a NUC and remote in from my home office via the LAN link. I use Splashtop for my remote in. Great minds think alike :). The one difference is that I have two USB hubs. I have one USB 3.0 hub mounted on top of my scope and I control things like the rotator, focuser, cameras via this USB hub. a lot less cables to get tangled with. and I have another hub, USB 2.0 setting right next to the NUC and I have the mount plugged into that hub along with with things like security cameras.Both hubs are powered.
I think you may need to look at the power settings in the Windows 10 OS. I believe you’ll find the USB power option there. I can’t remember where in the OS the power options are but maybe you can Google it and you might find something. I’m currently imaging and I don’t want to mess with the computer while it is imaging. Maybe someone can jump in to help and point you to where to look?
The one thing I did notice i your reply is that you did not mention using a powered USB hub.
Regards,
Mark