If Keyboard Volume keys are not working on your Windows computer, then follow the solutions mentioned here to resolve the issue.

If Windows 11/10 Taskbar Volume Control icon has stopped working & when you click on the volume icon nothing happens & you are not able to change the volume see this post.

But some of us like to use mechanical keyboards without their own volume controls, and would rather not have to fiddle with Windows’ on-screen volume slider. That’s where 3RVX comes in.

Yeah, it's a strange omission, not being able to assign function keys or keystrokes to volume up/down. <BR><BR>I use PTH Volume Control for my Model M keyboard.

Some users report that the keyboard audio volume controls fail to work properly under Mac OS X 10.4.4 One reader writes ...

For one, the extra functionality of my keyboard (volume control, hotkeys, browser control, etc) no longer work, as the keyboard is not directly connected to the individual omputers, but rather is ...

As of OS X 10.5, however, this problem has been resolved—as long as you’re using an Apple keyboard, or one that doesn’t use its own drivers to make its volume keys work.