When you open Control Panel, Security Center applet, the three icons below may be missing under the section Manage security settings for:
Automatic Updates | Windows Firewall | Internet Options
To restore the missing icons, download the utility (seccentericons ~11 KB) and run it. In the utility, put a checkmark near these items:
Then click the Apply button.
Windows Security Center applet in XP SP2
For Windows XP Professional users: In addition, you may add or remove Group Policy Editor and Local Security Policy icons to the Windows Security Center (optional)