Phil, there are Win 10 drivers for your IDT HD Audio here:

http://www.driverscape.com/download/idt-high-definition-audio-codec

You should uninstall your old drivers first then install the new drivers as per your IDT's instructions.

Driverscape is a good site where I have never had any problems.

Good luck and I hope this works.

Ps - sometimes you have to right click on the install exe file and run as administrator, sometimes you have to run the exe file in compatibility mode and sometimes you have to do both.

When you are at the checkout line and they ask if you found everything say "Why, are you hiding stuff?"

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware