Hello again hildergarn,
I noticed this from http://www.tamba2.org.uk/wordpress/xampp/
Download and unzip WordPress.
Open the file wp-config-sample.php
These are the exact details you need for Xampp to work because the default user in phpmyadmin is called 'root' and there is no password.
`define('DB_NAME', 'wordpress'); // The name of the database
define('DB_USER', 'root'); // Your MySQL username
define('DB_PASSWORD', ''); // ...and password
define('DB_HOST', 'localhost'); // 99% chance you won't need to change this value`
Copy those details into your wp-config file, and save it as wp-config.php
Found that courtesy of:
If this doesn't take care of it, I would suggest posting this question in the localhost part of the forum.