I lost sound on my laptop the other day, I updated the sound driver and this worked fine but when I shutdown the laptop a booted it back up later in the day the sound was gone again, and over the icon in the system tray there was a red cross, hovering over it you get a message saying no audio output devices is installed, I have tried reverting back a couple days but this has not worked. I went to control panel and under sound it just says no devices installed and in device manager it only there is no bit for sound, video and game controllers. Please can somebody help
Cheers