IM works great on Win 10, in fact better than other OSs. The only win 10 issues were from people running the RC or beta builds of windows, of course those are going to have issues. But on a fully upgraded non insider or fast track build of Win 10, IM should work great out of the box.
Absolutely no issue by USB connection or Bluetooth link for a long time.
But now :
the DS4 works fine directly by USB connection,
by Bluetooth link, the DS4 is recognized only by Windows, but not by InputMapper. The DS4 light is white still instead of personal configuration, and a message indicates in IM "AC:FD:93:71:90:54 encountered synchronous write failure attempt (6/5): 170".
The only solution found is to unpair the DS4 to Windows, then re-pair it again. At this moment, IM find it automatically.
This bug appears at each new start up of Windows.
My configuration :
Bluetooth dongle ASUS BT400
If someone knows something about it, many thanks for your help.