Install back default audio

LAST DAY I JUST ACCIDENTLY UNINSTALL MY CONEXANT HIGH DEFINITION AUDIO..AND THEN I OPEN UP THE PLAYBACK DEVICES AFTER I'VE JUST SEE

Speaker
High Definition Audio

Headset
High Definition Audio

i don't like dat settings so trying to download conexant driver back AND THAN THIS HAPPENING

"Driver Installation Failed: Could not find the device for this driver"