I installed Xampp (for Windows). I was happily using it with its all features.
Then I wanted to change MySql password. I set a randomly generated password (rCZ4Xnz78
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 :)