I just updated my macbook pro OSX 10.8.2 and now the speakers won't turn off mute.

I did the software update, and upon restarting the speaker in the dock is off, and in the system preferences I am not allowed to uncheck the mute.  Using the keyboard buttons doesn't work either.

I have had the same exact experience. I purchased my MacBook Pro about a month ago and I've been using the wireless Airport ever since with no problems whatsoever. Today I went to use my Mac and the "no airport card installed' message appeared as if I have no airport card.  How can that be?  I'm not sure what could have caused it.  I have updated my mac as often as updates are available and all I can think is that the most recent has interfered.  Any thoughts on what went wrong and how to fix it?
Thanks!
P.S.  I have since moved to Nepal and the chat line only asks for US or Canadian phone numbers.  That can't work - what about on - line chats?
Message was edited by: ronfromamesbury

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