When I open phpMyAdmin I have this message: "Your configuration file contains settings (root with no password) that correspond to the default MySQL privileged account. Your MySQL server is running with this default, is open to intrusion, and you really should fix this security hole by setting a password for user '.root'."
When you install WAMP a user is automatically setup called root with no password
If you want to setup a password for the root user you can do so via phpMyAdmin. However once you have set the password you'll have to configure phpMyAdmin to use the new password for the root user, which you do so by editing the config.inc.php in C:/wamp/apps/phpmyadmin