Volume button on taskbar doesn't show up any controls

Today, when I booted my Windows 10 PC, it was extremely slow, and it takes 15 minutes for everything to be stable. I can use the PC as normal, but how matter I try, I cannot get the volume button in the taskbar to be working. When I clicked it, nothing showed up, no controls show up. I right clicked it, no context menus showed up. Other icons in the taskbar still works normally. Source

I tried to go into Settings and to the "Sound" part. When I went into the "Sound" part, it froze for minutes before showing the volume settings. I can only control the volume there, and not from the icon on the taskbar. I turned the icon on and off in taskbar settings, but it still isn't working.

Google doesn't tell anything helpful; it only shows me how to fix it when the icon itself doesn't show up. Now, the icon appears, but doesn't do anything. Can anyone help?