PHPMyAdmin doesn't connect after root password change

You need to edit the config.inc file in the phpMyAdmin directory (probably C:\xampp\phpMyAdmin) and change this line to match the password you entered for root in phpMyAdmin.

$cfg['Servers'][$i]['password'] = ' ';

If you have installed WAMP, go to the [wamp root]\apps[phpmyadmin installation] and find the file config.inc.php. Then you have the change the following entry to the new password of the root user.

$cfg['Servers'][$i]['password']

save the file and don't forget to restart WAMP services. Now it should work as a charm :)