Network won't close

When I open 'network' in system pref I get a drop down message saying that they have been changed by another application. When I click on OK it comes back again and I have to use force quit to close System Pref. Can anybody give some advice on this?

Hi there...
To stop the pop-up, Go to System Preferences: Security. Check the box next to "Require password to unlock each secure system preference." Then lock Security.
Try this cure for Security update...
http://discussions.apple.com/thread.jspa?threadID=1730909&tstart=0
The locations are actually...
/Library/Preferences/SystemConfiguration/preferences.plist
/Library/Preferences/SystemConfiguration/com.apple.airport.preferences.plist
/Library/Preferences/SystemConfiguration/NetworkInterfaces.plist
/Library/Preferences/SystemConfiguration/com.apple.nat.plist

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