Windows Vista - http://www.vistaarticles.com
Kill Security Center Notifications
http://www.vistaarticles.com/articles/64/1/Kill-Security-Center-Notifications
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Published on 08/20/2006
 
There is a new easy way to disable the security center messages.
Kill Security Center Notifications

1. Click on the Security Center/Windows Security Alerts logo in the system tray.

2. Click Change the way Security Center alerts me.

3. Select I do not want notification messages from Security Center.