What happened to my computer's ability to play sound when I updated to OSX 10.8.2? I had a hard time updating from 10.8 to 10.8.2 and now that I have my sound is gone and not adjustable.

I have a 13" Macbook Pro running OSX 10.8 and when I tried to update to 10.8.1 through the Mac App store it didn't acknowledge that there was an update available so I went to the apple website and manually downloaded the update. When I attempted to update it that way the installer said that my computer did not meet the requirements of the update. That was strange as it was already running 10.8.
So I called apple care and then gave me instructions to restart my computer holding option+command+R and redownload Mountain Lion and after it finally finished, it installed but now I just noticed that my sound icon on the menu bar is greyed out and in system preferences I cannot adjust the sound output. I don't understand what happened, all I wanted to do was update my OS. If anyone has any solutions I'm open. I'm also going to set up a genius bar appointment.
Thanks.

I have a 13" Macbook Pro running OSX 10.8 and when I tried to update to 10.8.1 through the Mac App store it didn't acknowledge that there was an update available so I went to the apple website and manually downloaded the update. When I attempted to update it that way the installer said that my computer did not meet the requirements of the update. That was strange as it was already running 10.8.
So I called apple care and then gave me instructions to restart my computer holding option+command+R and redownload Mountain Lion and after it finally finished, it installed but now I just noticed that my sound icon on the menu bar is greyed out and in system preferences I cannot adjust the sound output. I don't understand what happened, all I wanted to do was update my OS. If anyone has any solutions I'm open. I'm also going to set up a genius bar appointment.
Thanks.

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