Security Agent is suddently appearing during startup and on my desktop

Hello,
So recently, during startup while my login/password page is loading, I'll see "Security Agent" appear in the upper left corner of my screen. Then ususally, maybe a half hour to an hour after I've started up, it appears on my dock, running. I can quit from the dock that's the only option I have. It will usually reappear randomly after that throughout the day.
Anyone have any ideas of what this is all about?
thanks,
Tucky

Hello,
Actually "Security Agent" is part of the OS. Here's a apple developers page explaining. http://developer.apple.com/documentation/Security/Conceptual/SecurityOverview/Architecture/chapter_2_section5.html
I just don't understand why a normally invisble operation is suddently appearing out in my desktop.
You can read my computer stats below. But in case you can't I'm on an aluminum power book running 10.4.7
thanks

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