Unneeded Services

run >> services.msc disable

go to Start > Control Panel > Security Center and select the link on the left hand side labeled "Change the way Security Center alerts me."

In the resulting dialog box, uncheck Firewall, Automatic Update and Virus Protection. After that step is complete, you may place the Security Center service in disabled and it will not start again or continue to be displayed in the system tray after a reboot.