Well, for the cause itself, on average, it’s caused by bugs. So, just click the up arrow you see in the notification area and make sure that the volume icon is not there. I hope your volume icon will be back on your taskbar.
If it’s already checked and the icon is not showing up, you need to uncheck the box, and then click Apply. Finally, tap the Restart button at the bottom-left corner of the Task Manager window. If your volume icon is missing from the taskbar, your first step should be to ensure that it is enabled in Windows. So with this trick you can now restore the former volume control slider.
If this icon is missing, follow the steps below. 4.Type explorer.exe and hit OK to restart the Explorer.
This might create problems when you are trying to watch your favorite video in YouTube or an audio of your choice. In older Windows versions, the Volume icon was hidden in the system tray if sound card drivers were not installed in the OS.