[1] KB2393802 is an intalled update.
[2] Norton Security Suite [is installed]...McAfee [Security Center] was installed a year or so back...
[3] Norton [Internet?] Security was originally installed, but long expired.
Please answer all of the following diagnostic questions by number in your very next reply (no need to quote this post):
A1. How about KB2482017, KB2485376, KB2479628 & KB2475792?
A2a. Is Norton Security Suite a freebie from your ISP (e.g., Comcast)?
A2b. Did you uninstall McAfee Security Center AND THEN download/run the McAfee Consumer Products Removal Tool BEFORE you installed Norton Security Suite?
A3a. Was Norton [Internet] Security installed when you were running Vista?
A3b. Had your Norton [Internet] Security subscription (or free-trial) already expired by the time you replaced it with McAfee Security Center (I presume)?
A3c. Did you uninstall Norton [Internet] Security AND THEN download/run the Norton Removal Tool BEFORE you installed McAfee Security Center?
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[HOW TO] Turn Windows features on or off:
http://windows.microsoft.com/en-us/windows7/Turn-Windows-features-on-or-off
TIP: If Media Features is disabled (turned off), please enable it (turn it on) for the time being. I think you'll find that KB2454826 will not install otherwise.
~Robear Dyer (PA Bear) ~ MS MVP (IE, Mail, Security, Windows & Update Services) since 2002 ~ Disclaimer: MS MVPs neither represent nor work for Microsoft