It's certainly not used to freshen things up. But that's what I read. Now it could be the sound is muted or set too low but again, do not use those restore features for what you wrote.
Bob
Hi, i performed an emergency restore on my laptop as it was running slow and i wanted to freshen things up, since i have done it i now have no sound, i have checked all volumes are turned on, checked device manager for any problems and none are reported, drivers are turned on and i have also tried reinstalling the drivers but still no luck ![]()

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic