How to disable the Security Center in Windows XP SP2 ?

The Security Center service in Windows XP Service Pack 2 monitors system security settings and configurations. (firewall, anti-virus and Automatic Updates status). To disable the service, use the following steps:

• Click Start, Run and type Services.msc
• Locate the Security Center entry in the list
• Double-click Security Center and set it's Startup type to Disabled

Note that this will turn-off the service, and also alerts the alerts issued by the Security Center. See here for more information about the alerts