error 404. Object not found in windows vista

[wasimguj]

i am using windows vista and visual studio 2008 also. but now i am using Xampp so there is an error

The requested URL was not found on this server. If you entered the URL manually please check your spelling and try again.

If you think this is a server error, please contact the webmaster.
Error 404
localhost
08/08/10 22:17:08
Apache/2.2.9 (Win32) DAV/2 mod_ssl/2.2.9 OpenSSL/0.9.8h mod_autoindex_color PHP/5.2.6

Please help me to solve this problem

[JonB]

You don't say when or how you get this error?