Reset XAMPP localhost password

+ See if there is .htaccess file in C:\xampp\htdocs\xampp folder and if you find one then delete it.

+ Also look in C:\xampp\security for a .htpasswd file and delete then the htdocs and delete any .htaccess files you find.

+ Restart Apache and MySQL and you should be able to proceed without needing a password.

Nguồn: http://www.apachefriends.org/f/viewtopic.php?f=16&t=47874