Notebook Audio

UPDATED AS: Something is deleting Settings>Sound>Output while laptop is running. Suddenly get "No Audio output".

I suddenly get no audio after computer has been on and running fine for awhile. Red X on Taskbar audio. Settings>System>Sound says: "No output devices found"

On Restart, audio is fine. Settings>System>Sound says: "Speakers (Conexant ISST Audio)"

But after awhile, problem happens again.

Tried Troubleshooting, yielded: "Troubleshooting couldn't identify the problem."

Tried  HP Support Assistant>Support>OneClickFixes>AudioCheck

      Audio Diagnostic Results:

             Task: Audio device is disabled    Status: Fixed

             All other tasks: No Issues Found

       Microphone Diagnostic Results:

             Task: Audio device is disabled    Status: Fixed

             All other tasks: No Issues Found

        Audio Check Diagnostics: Repairing the Audio Drivers:   Driver status:Installed

But problem reoccurred.

Tried: HP Support Assistant>Troubleshooting>NoSoundfromtheComputer

    Recommendation: 'In Device Manager. find your sound card, open it and Update Driver',

    In DeviceManager> Sound, video and game controllers > Conexant ISST Audio

          RClick>UpdateDriver  yielded eventually

                            "Windows has successfully updated your drivers"          

          Restarted and again, after awhile, problem reoccurred.

   Opened DeviceManager>AudioInputsAndOutputs

                 Tried:     MicrophoneArray(Conextant ISST Audio)>UpdateDrivers

                 Tried:     Speakers(Conextant ISST Audio)>UpdateDrivers

        Both yielded: "Windows has determined the best driver for this device is already installed."

Finally Checked that Windows Update is up-to-date.