The default theme of Windows XP. Nothing else boring like that! Windows XP is an old OS. But still many XP themes are coming out in the web. This proves that people still use it and like it, except for its theme. Here are some excellent themes for Windows XP I found.
Royal Inspirat Special Edition
SevenVG Black Theme for Windows XP
Macintosh Theme for Windows XP
All 25 themes are looking attractive but my one of the favourite is the Leopard by Apple. It’s a good themes among all the themes..