My WindowsXP user profile somehow

My WindowsXP user profile somehow got corrupted. When I booted up my laptop a few minutes ago, all the configuration I had done (Themes, folder settings, IE preferences, bookmarks, etc.) were gone. I wonder if all this is hidden somewhere, or if I just need to manually reset everything.

This is a case where bundling IE with Windows is affirmatively bad. Just because Windows screwed up on of its config files doesn’t mean my browser should lose the link buttons in the toolbar that I used to click on about fifty times a day.