// checks for configuration file, if none found loads installation page
//if (!file_exists( 'configuration.php' ) || filesize( 'configuration.php' ) < 10) {
// $self = rtrim( dirname( $_SERVER['PHP_SELF'] ), '/\\' ) . '/';
// header("Location: http://" . $_SERVER['HTTP_HOST'] . $self . "installation/index.php" );
// exit();
//}
Clear your cache and the installation is done. Joomla will load normally now.