I have some Windows 8.1 Surface Pro 3 tablets that have a USB hub attached and a Microsoft USB -> RJ45 network dongle attached. When someone remotes into these systems, they can usually connect but when they drop the network stops responding to pings. The dongle still shows in the device manager but will not pull an IP any longer. Either have to disconnect and reconnect the dongle or reboot to get the problem to stop. Any thoughts?