Have you installed the 2Qute driver for PC? I don't use a PC myself, just a thought.
I already did installed driver, if I remember correctly even when I didn't install driver, PC still detect 2Qute with stock cable though.
Does Wywires Platinum USB allow the USB power signal to reach 2Qute? Some USB cables made for hi-fi prevent the USB power signal from reaching the DAC. 2Qute requires the power from the USB cable to power the circuit that interprets the digital data. The optical input is the reference for sound quality with 2Qute, so distrust a USB cable if it sounds different.
I don't know technical design of 2Qute & Wywires but maybe you're right... if it's true then I've to change 1 of these 2. Thank you.