Yesterday I installed a windows update, a few hours later I started playing a game of CS:GO on my laptop running Windows 7 Home Premium 64 bit. All of the sudden I was starting to get random static noises, at first it was only a little bit, but it gradually got worse until it was static constantly and I could barely hear sound, I was using earphones at the time, and eventually the sound even started bypassing the earphones and my earphones stopped working completely. After my game I restarted and when I started up again, there is a x at the bottom of my sound icon, and it says "No audio output device detected". I looked through device manager and my audio driver, Realtek High Definition Audio Driver was gone. (http://esupport.sony.com/US/p/swu-download.pl?mdl=SVE15115FXS&upd_id=7555&os_group_id=6) All I have left is a few other drivers that don't actually do anything, and this one driver which I installed for some reason - can't remember with a yellow question mark on it. I tried uninstalling thta, but my sound still does not return. I tried scanning for hardware changes and nothing happens, I've tried reinstalling my audio driver but it doesn't show up, system restore doesn't work either. Can someone PLEASE HELP ME!