The Light Harmonic Audio Driver is not signed by Microsoft, and on some systems it will not enable properly. The "Driver Signature Enforcement" option will need to be disabled.

The "Driver Signature Enforcement" can be disabled by tapping the F8 key before the Windows boot screen appears after powering on the computer. Under the advanced boot options, use the down arrow key to highlight the "Disable Driver Signature Enforcement" option, and press Enter to select it. 

Note: This will need to be done during every subsequent reboot.