My laptop's sound control button is not working?

it is stuck on mute. if i press the up/down button, nothing happens. how do i fix this?My laptop's sound control button is not working?
did u install the drivers of hardware of ur laptop


is it a new system that u installed urself.


try to install the drivers again.


if the problem caused by software,then u can slove it by installing the drivers.


but if it still can't be working after installing the drivers,u need to send it to a computer shop.My laptop's sound control button is not working?
Go to settings/control panel/system/device manager


and delete the sound device and shut down. Reboot


and you should get the message ';new device found'; see


if windows can install it from the windows files.


If it is not there you will have to download the driver and install it manually.