I am using Dell 15 r 3521 in windows 7 os.
when i attach my headphone it is not working at all. I update driver and its shows "Best driver for your device already installed".
when i remove headphone than no sound at all in laptop.
when i try to restart and shutdown its not shuting down.
i also take help of "MicrosoftFixit.AudioPlayback.RNP.160312495306123163.1.1.Run" but it cant find any thing.