In Windows XP, when I right-click on the desktop and go to "Properties," you know how it's supposed to have tabs for "Screen Saver" and "Appearance" and stuff? Mine doesn't now for some reason. It's making me sad. When I open the properties, all it has is "Display Properties" that give me options for the overall theme of Windows. It makes me sad. ;_;

Any ideas how to fix it, short of reformatting?