Hello bnice910,
Welcome to the HP Forums! I hope you enjoy your stay!
I understand that your mute button has stopped working since an update. I will do my best to assist you with this issue!
First, I will suggest you perform a System Restore on the computer. You can use this to return the computer to a point (restore point) before this issue occurred. Bringing the computer's state back in time could resolve the issue. For more information on this, please reference this Microsoft website: System Restore
Next, I would make sure the correct drivers are installed if the issue is not resolved. Incorrect drivers could cause this issue. You should use HP Support Assistant for this task, and I will provide information on how to do this: Downloading or Updating Software and Drivers for HP Computers
I believe this troubleshooting will help you. Either way, please post your results. Thanks for bringing this issue to the HP Forums. Have a great day!
Mario
