|you need to provide some more information. When you say volume is not responding are you saying that there is volume, but you cannot adjust it? ie cannot go higher or lower?|
or are you saying there is no volume at all?
do you have a volume control on your laptop? on some laptops you have a round turning switch which controls the volume do you have one on yours? if so confirm it is turned up.
have you checked device manager to see if you have any corrupt or missing drivers? if not, then go into control panel, system and then device manager, if you see any yellow exclamation marks or question marks.