How do I turn the system icon for sound on (currently off; greyed out)

Ztruker said:

I think you clicked on one a wrong reg key, There is no Deployment under TrayNotify:

Attachment 42166

Thanks. You're right, I probably did click on a wrong reg key. I went back through the path and deleted the two reg entries per below, restarted, and this did fix the problem and displayed the speaker icon in the task bar again:

I also followed the path laid out in the 'Windows 10 System Icons in notification Area Are Greyed Out' link.

1. Hold down the Windows Key and press the “R” key the bring up the Run window.
2. Type “regedit“, then select “OK“.
3. Navigate through the registry to the following location:
   
   • HKEY_CURRENT_USER
   • Software
   • Classes
   • Local Settings
   • Software
   • Microsoft
   • Windows
   • CurrentVersion
   • TrayNotify
   
   
4. Look for two values. One named “iconstreams” and “PastIconStream“. Right-click and select “Delete” each value to remove them from the registry.

Thank you! Also thanks to everyone who contributed toward a solution. Sincerely appreciate it!