Hello NotEnvious,
Thank you for that information. I actually assumed the HP Support Assistant had already updated your drivers so the drivers I posted for you to install are actually an older version of your audio drivers for your computer running Windows 8. If you could give them a try and let me know the results I believe it will resolve your issue.
We can then look to see why the updated drivers caused you to have this issue. Thank you again for posting on the HP Forums. Have a great day!
