Hi, I have a Lenovo Ultrabook with Windows 8, and a little while back the sound just stopped working. It's not the speakers - it still makes sounds when being switched on/off etc, it's just when trying to play music/videos/games that it doesn't work. I've read somewhere that one of the endless updates this thing subjects you to had a glitch that caused similar issues for other people, but I haven't been able to fix it. Any of you amazing people got any advice? Thanks in advance!