No, it's XP Home and XP Professional. What I think people are seeing is the difference in the Control Panel between "category view" and "classic view". If you open the Control Panel (as Donna described above) and DON'T see the Performance and Maintenance icon in the control panel, look along the left side of the screen. There should be an option to "Switch to Category View" (in the blue section of the left side of the window). It'll rearrange your Control Panel and you'll see the Performance and Maintenance icon pop up and you'll be able to follow Donna's instructions above.
To get back your regular icons in the Control Panel, click on "Switch to Classic View" in the same section of the Control Panel.
Masaki