Sound not working on my 27" iMac after updating to Mac OS X 10.6.8.

Hey,
I recently updated my 27" iMac 3.06 GHz Intel Core 2 Duo software to Mac OS X version 10.6.8 using the software update tool.  As soon as the update finished, I noticed the audio was no longer working on my computer.  The issue appears to be system wide becuase no applications will play any audio, and when I adjust the volume using my keyboard I do not hear the usual clicking sound.   
I have tested the audio using the iMac's built in speakers, external speakers, and headphones; none of which worked.  Also, in the system prefences > Sound I have tried changing the sound output between the two possible options, Soundflower (2ch) and Soundflower (16ch), neither of which changed anything.  Does anybody have any clue as to what might be going on here?  If anybody has a tip for me, please do share. 
Thanks in advance.
Azaad

Hi,
If you are experiencing issues with Software Update you could try the Combo Update:
http://support.apple.com/kb/DL1399
Cheers,

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