a week ago i was on youtube and in the middle of a video my sound stopped working on my acer laptop. i checked to see if it was the video and it wasnt because my sound will not work when i play my games, use skype or watch movies. i check to see if its muted, or if i uninstalled a driver by accident and none of those are it. i went to device manager and checked if there were any question marks under sounds, video and gaming and there is none. now i am not good with computer stuff so if anyone helps could you explain as simply as you can? thanks.