Thread:Manual talk:Installation guide/MessagesEn.php is missing

I am trying to install a mediawiki on an hosted space by aspnix, it's a Windows Server 2008 R2. I am trying using the installation offered by the hosting platform but also trying to make installation by myself.

In any case I keep the result the home page says to me "MediaWiki 1.20.3 LocalSettings.php not found. Please set up the wiki first. " I accept the suggest and I click "set up the wiki" pointing to /mw-config/index.php. This page returns an Internal Error: MessagesEn.php is missing.

Please can you help me to solve this matter?

Thank in advance, Marco