In case someone has similar issues, hope this helps. I had 3 sound related issues on my laptop after the upgrade to win 10 from 7. - The volume was so low I could hardly hear anything. - The mute light was always on, f11 worked to mute and unmute. - Beats audio disappeared. My HP DV7-4065dx is no longer supported by HP but I was able to google the original IDT HD software. I installed the package and all is fixed!