No sound at all.

I Lost all sound after i updated my intel drivers and then my nvidia drivers and its now saying that there is no output audio device install and then when i try to update the drivers it says there is a problem. (i use windows 7 64 bit)
Basically just watch this video and see if you can see whats wrong and if you need more info then just ask:
http://www.youtube.com/watch?v=gvPPt...ature=youtu.be