Security Center is entry 10 of 10 on the first screen of Settings in Windows XP SP3, holding 6 options and 15 more on the screens they open, in the order the device shows them.
Firewall ON
Automatic Updates ON
Virus Protection ON
Windows Firewall
On (recommended)
Off (not recommended)
Do not allow exceptions
Exceptions
Automatic Updates
Automatic (recommended)
Download updates for me, but let me choose when to install them
Notify me but do not automatically download or install them