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Remove Security Center Icon
http://www.vistaarticles.com/articles/91/1/Remove-Security-Center-Icon
By 
Published on 10/30/2006
 
The Security Center icon in the notification area is a nag.

Remove Security Center Icon
There's just no other word for it. And if you're confident that your security settings are in order, you really don't need the nagging. To make Security Center disappear into the background, open its icon in Control Panel and click Change the way Security Center alerts me in the Tasks pane on the left. In the resulting dialog box, choose Don't notify me and don't display the icon (not recommended).