Can't install IDT audio driver (No Audio Output device is installed)

Hi, 

I have a HP Envy M6-1116tx Laptop  Product number: C7E76PA#ABG.

I am trying to install it's audio driver, but it keeps giving me error message. I have downloaded orginal .exe file but gives an error "The hardware detected is not supported by this IDT software package". 

I findout that the audio chip on the motherboad reads as " IDT 92HD91b2x5" just wondering if the driver can be identified for this particualr chip.

Thanks,

Harry