jdixon4, Try deleting all the network adapters and reboot the computer. The network adapter should come back. How big are the files you are trying copy?
I have a new XPS15 9560 and a TB16. I have things working, but I have one issue with network connectivity via Ethernet. When I try to copy large files from our network to my PC, the copy looks like it is going very fast but at the end it fails with an unknown error. I also get download errors when trying to get updates from the Internet. I have updated all drivers, BIOS, etc and have tried this with both Airplane mode on and off. WiFi works just fine. I also have used a DA200 adapter to connect via Ethernet and it works fine. It is just the TB16 which has issues.  Any ideas what is causing this problem with my TB16?
TB16 Ethernet connection can't copy large files