I have the TEAC NP-H750 which uses the same chip and drivers and I had the same screen saver/sleep issue in Windows. I had to disable the "HID-compliant consumer control device" that is installed along with the audio device. It's easy to find if you select the TEAC audio device and then go to View->Devices by connection.
Edit: This is all done in the Device Manager
How is TEAC NP-H750 sounding?