Thread:Project:Support desk/Error running the update script/reply (18)

Reading through what you've said so far, you said you installed MediaWiki originally from some control panel on your web host? I wouldn't suggest uninstalling it from there since it might delete the databases. I don't know but I can't be certain. If you have access to FTP on your server, try to log into that. You should be able to download the latest tarball version of MediaWiki from the main page, extract it, and replace the contents of your server's MediaWiki directory with the new version you download. Make sure you keep the LocalSettings.php file on your server though! This isn't guaranteed to work, so I wouldn't suggest doing it if you don't want to take a risk. It's kind of an inefficient way to update MediaWiki, but it is a way to update it.