Volume slider won't stay up. Please help! Thanks!

I'm using a HP Pavilion zv5000.
The volume up button makes the volume go to mute. I don't know whats going on and the volume slider won't stay up. :confused

 

Double-check that you're pressing the correct buttons. The first button from the corner is volume-down, the next is volume-up and the next is volume mute.

Does pressing the volume-up button really put it into mute? If so, you might have a driver problem or something, though it sounds more like crossed wires!

Open the volume slider tray application and watch what happens in it when you press the buttons. Or check the same in the Sounds and Audio Devices controls in Control Panel.

Are you running an application that has volume controls in it, like MediaPlayer or the videos on youtube? If the controls in the applications are set low, that will be reflected in the system's controls. I usually set the application controls to maximum volume and I control the system volume with the hardware buttons.

Let us know what you found out.