Thread:Project:Support desk/New install. No admin account./reply (7)

Then the same solutions will work for you. Let me copy, what I already wrote a year ago and what you already find directly above your question:

If it is a new install, the easiest would maybe be to delete the database contents, remove LocalSettings.php and then to start installation again. And then: Remember the username, please! ;-)

A second approach would be to go to the page Special:ListUsers in your wiki and to let MediaWiki display a list of those users, which are members of the group "Administrators".