I have a Plugable UD-3900, with a Dell Inspiron laptop and Dell external monitor connected via the VGA port. Have had the UD-3900 for three years. Yesterday the monitor froze; the frozen display also displayed when I changed monitors.
Operating system is Windows 10. The system control panel shows “Unknown USB Device (Set Address Failed). Windows has stopped this device because it has reported problems. (Code 43)”
Otherwise the docking station is working normally, so it seems the problem may be in the VGA port.