Vista comes with many more fonts than past Windows operating systems. People report having over 300 fonts. One reports having 8500+ fonts installed! Of course, some could come from programs. One of Microsoft's developers isn't aware of an official list of fonts anywhere on the web. He provides a list of Vista fonts.
Windows Vista includes both TrueType Fonts and OpenType fonts. TrueType are scalable and readable for all sizes. OpenType fonts add more features to the basic character set including small capitals and detailed shapes. Like TrueType Fonts, you can read OpenType Fonts in all sizes. Vista adds six new fonts optimized for ClearType -- all starting with C. They are Calibri (default), Cambria, Candara, Consolas, Constantia and Corbel, as you can see them in the image below .