Norton Internet Security Icon Missing from System Tray

Yesterday I upgraded my Norton Internet Security from the 2009 version to the 2010 one.  This morning I noticed that the yellow NIS icon was missing from the system tray.  My heart sank.  I have had problems with this before and it took hours, even days to sort out.  However, this time I came across this article at the Symantec Norton support site:

Norton icon does not appear in the system tray after I install the latest updates for my Norton 2010 product or Norton 360 Version 4.0

I downloaded the patch, applied it, restarted my PC, and the NIS icon is back again!  I feel much better now.  Malfunctioning security software makes me very nervous, almost paranoid.