i tried to open that index.php file in the htdocs folder
and the same error again...
<?php
if (!empty($_SERVER['HTTPS']) && ('on' == $_SERVER['HTTPS'])) {
$uri = 'https://';
} else {
$uri = 'http://';
}
$uri .= $_SERVER['HTTP_HOST'];
header('Location: '.$uri.'/xampp/');
exit;
?>
Something is wrong with the XAMPP installation :-(
and also the old problem is back...when i click on start button in front of mysql it shows running in green color for 2-3 seconds then disappears.
when i click on start button in front of Apache server it shows running in green color . and keeps on running...
so mySQL is still not working.

i have no idea WTF is going on..