Hello, I was also having this problem with my HP dv41120us and found a solution that works!
The mute icon on my keyboard keeps on making a sound whenever it turns to orange color. Also most of the time, my laptop just freezes and I'm thinking might be something related to my sound device. Most of the suggestion here says you have to reinstall your sound driver
. They are correct but you need to install the correct driver else they won't work.
The driver I used is sp41693.exe which can be download from HP (just google it I'm sure you'll find where to download it). Hope that helps. Good luck!