2. My K1 can't be recognized or used on the computer?

A:  1. Firstly, the K1 installation is driver-free.  When connected to a computer for the first time,  the computer will recognize it and install it automatically. To see whether it has been installed successfully or not, just check the computer's Device Manager to see if "FiiO USB DAC K1" shows up. Afterwards, the computer will never show any hardware installment prompts again as long as you connect the K1 to the same USB port.
Choose 'FiiO USB DAC K1' as the audio output device on the computer's control panel or your audio player's output configuration to enjoy the music throught the K1.

2. If the K1 shows up as "USB Audio Device" rather than "FiiO USB DAC K1", that's the sign of an unsuccessful installation.  Please uninstall the USB Audio Device in Device Manager, then unplug the K1 and replug it to reinstall.