The DB should be “mysql”, not “wordpress”.
Log into phpmyadmin and you will see the db name. Make sure to add a user and password with all rights/privileges. Use that as your username instead of “root”. Do not add a password to root, it will cause phpmyadmin to crash.
Under WAMP, all files s/b here: C:\wamp\www\wordpress\ (wordpress optional & highly recommended so you don’t overwrite the localhost index.php)
XAMPP should have a similar named folder.
Good luck…techdork
