Computer keeps randomly muting itself

Hi Meta,

Thank you for posting in Microsoft Community.

I regret the inconvenience caused to you. Let me help you.

Please share the following details.

1. Have you tried with a different browser? What is the status?

2. Is the issue persisting only in YouTube?

3. Have you checked with any other websites? What is the status?

4. Do you receive any error code or error message on the screen?

I suggest you to follow the below methods and check if it helps.

Method 1:

I suggest you to run the Hardware troubleshooter and check, if it helps.
 
1.  Type Troubleshooting insearch bar and click Troubleshooting under Settings.
2.  Now type Hardware Troubleshooter in the search option.
3.  Click on Hardware troubleshooter to run the troubleshooter.

If the issue persists, follow the below method.

Method 2:

This issue occur due to the sound, video and game controllers driver may not be compatible.

I suggest you to download the latest the sound, video and game controller driver updates from the manufacturer’s website and check, if it works.

If the issue still persists, I suggest you to roll back the driver updates and install the latest driver in compatibility mode and check, if it works.

Follow the steps to install the drivers in compatibility mode.

1. Download the latest the sound, video and game controller driver from the manufacturer’s website.

2. Right-click on the setup file and click on "Properties".

3. Click on the ‘compatibility’ tab and check the box "Run this program in compatibility mode” and select previous Operating System from the drop down.

4. Click on ‘Apply’ and click ‘OK’ and run the file to install it.

Check if it helps.

If the issue persists, please reply with the details and updated status of the issue. We will be happy to assist you accordingly.

Thank you.

This has been occurring to me too, but I have a headset. I find when I use Troubleshoot it does nothing or turn the volume up it simply just decreases itself constantly. It'd be greatly appreciated for a reply and I know this was over a year ago, also all my sound apps are up to date.