Upgrade OS to 10.9.1 leads to loss of internet connection

Last week I downloaded OS10.9.1 onto my iMac.  Before the download I used the iMac with use of airport wireless.  I also used the same wireless service for my MacBook, iPad and iPhone 3 GS.  After completing the OS10.9.1 download, when the iMac was on the internet (using airport wireless), my wireless internet service WAS NOT available for my other Mac products.  The other iMac products showed they were receiving a wireless signal, however no internet service was available through Safari and I was unable to connect to iTunes.  However once I turned off the iMac, the wireless internet became available for the other Mac products.  Once I turned the iMac back on, the wireless service again WAS NOT available for the other Mac products.  I read through other discussions, however none seemed to match my situation.  Any suggestions to correct the situation?  Thanks ahead do time!

Check if Internet Sharing as been enabled with the update, if so turn it off.
This shows how to turn it on, just disable it to turn it off.
http://support.apple.com/kb/PH13855

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