Last night; my headphones randomly stopped working and all sounds stopped except my friends voices in Skype. I was really tired at the time; so I turned off my computer and went to bed. I turned it back on this morning; and there's no sound at all, and my microphone isn't working. I tried installing the driver I was missing (Realtek AC'97 Audio for VIA (R) Audio Controller ) and it installed properly; but no sound is playing and the driver is not showing up under the hardware/audio tab. Any help?