Hello streborr. I understand you are experiencing missing sound functionality, and I will do my best to assist you! This document provides troubleshooting steps that will resolve your sound issues.
If not, I would attempt installing all the drivers for this computer and operating system. These drivers are located here. Afterward, I would ensure your Windows updates are complete.
Please respond when you complete this troubleshooting. Thanks for posting on the HP Forums. Have a great day!
Mario