Having reported this issue to the support and have a ticket for this since now more than 6 month
and no solution given yet and solution at the sky.
I have this on various PC's using similar USB 3.0 host controllers.
The issue is:
1. Boot Win 10 & login
2. Waiting BD agent to show on tray
3. Open the Windows Explorer
4. Insert an external HD on USB 3 Intel eXtensible Controller
5. Refresh Windows Explorer... and long bar starts...
6. Finally Explorer hangs forever
7. Using task manager I cannot terminate the Explorer, just ctr-alt-del to shutdown fixes the hanging/blocking/freeze
Does other deals with this culprit/bug too?? 
Hp