Once you have opened a new tab in the browser, go to http://development/phpmyadmin, log in as root, and go to the Users tab along the top. Hit the "Add user" link to create a new user. Make sure you check the created database for user box, fill in the username, select Local from the drop down for Host, and Generate a password. Do Not Hit the Go button Yet!!! You want to select the generated password, copy it to the clipboard, and switch back to the tab with the Drupal installer.