I had the same setup regarding the and the DK2…
It all works fine with 4.9…
So…
DK2 has been used on the computer, but is unplugged.
The is plugged in.
Cant get the HMD to work in 4.10 for the (not sure regarding the DK2)
OS:Windows 10
GPU:980GTX Evga
Latest oculus runtime and latest graphic drivers
(Not sure if this information might be of any help)