The best I have found to run the QHY range is the Ascom drivers.
Look in the forum, near the bottom, "Software".
Find the 64 bit drivers and try to install this, it works with the 32 bit system also. Once the driver has been installed go to
www.astrosoft.be and install the Ascom driver. Reboot your computer and with any luck it should all work. You will need the latest Ascom platform installed on your computer first.