Michael, I'm just starting to use XP so am learning too. But I went to the Control Panel and opened the Fonts folder. Can you find the Roots Font Roots.TTF there? It is 25K and dated 10/20/1995. I don't think there should be a problem with the number of Fonts in XP.
Maybe you should use Explorer Find to see where it is installed. Should be in the UFT main folder and in the Font folder.