There was a problem with Windows 8 HP Laptop. VLC had no sound. YouTube had no playback. No sound at all. Proably not video either. Device Manager said everything functioning properly. I changed the volume controls with the speaker icon, internal keyboard, USB keyboard, to make sure it was not on mute. I had no choice but to restart. Sound works now. But how to keep this from happening again?! The troubleshooting website says to restart. EVEN YouTube said If Playback Begins Shortly, Try Restarting Your Device!! This is not acceptable. I want to know the cause and I want to know how to fix the sound WITH ZERO restarting involved. If anybody knows the information then kindly provide it. If there is no solution, then Microsoft does not know how to make operating system function.