Thread:Project:Support desk/MessagesEn.php is missing. on new mediawiki install on windows home server 2011

Hi I am having an issue (similar to another member but his/her thread is RRESOLVED)

i installed mediawiki on a Z drive (not on my C: drive) and i'm assuming this is the issue. when i go to http://localhost/mediawiki/ I am present with the localsettings.php not found and cick setup to start. So i do, but then i receive the below message

'''MessagesEn.php is missing.Backtrace:#0 Z:\ServerFolders\Downloads\mediawiki\includes\LocalisationCache.php(283): LocalisationCache->initLanguage('en')  When i go into my localisation settings and change a value, i can see i now get http 500 error. So i know th issues is the server cannot find the file. so i'm assuming its lookiing for it on the c: drive and not ym z: correct path.
 * 1 Z:\ServerFolders\Downloads\mediawiki\includes\LocalisationCache.php(218): LocalisationCache->loadItem('en', 'namespaceNames')
 * 2 Z:\ServerFolders\Downloads\mediawiki\languages\Language.php(338): LocalisationCache->getItem('en', 'namespaceNames')
 * 3 Z:\ServerFolders\Downloads\mediawiki\includes\search\SearchEngine.php(327): Language->getNamespaces
 * 4 Z:\ServerFolders\Downloads\mediawiki\includes\User.php(1215): SearchEngine::searchableNamespaces
 * 5 Z:\ServerFolders\Downloads\mediawiki\includes\User.php(2160): User::getDefaultOptions
 * 6 Z:\ServerFolders\Downloads\mediawiki\includes\context\RequestContext.php(274): User->getOption('language')
 * 7 Z:\ServerFolders\Downloads\mediawiki\includes\StubObject.php(160): RequestContext->getLanguage
 * 8 Z:\ServerFolders\Downloads\mediawiki\includes\StubObject.php(105): StubUserLang->_newObject
 * 9 Z:\ServerFolders\Downloads\mediawiki\includes\parser\ParserOptions.php(334): StubObject->_unstub
 * 1) 10 Z:\ServerFolders\Downloads\mediawiki\includes\installer\Installer.php(360): ParserOptions->__construct
 * 2) 11 Z:\ServerFolders\Downloads\mediawiki\includes\installer\CliInstaller.php(44): Installer->__construct
 * 3) 12 Z:\ServerFolders\Downloads\mediawiki\mw-config\index.php(36): CliInstaller->__construct('MyWiki', 'administrator', Array)
 * 4) 13 Z:\ServerFolders\Downloads\mediawiki\mw-config\index.php(20): wfInstallerMain
 * 5) 14 {main}'''

What do i need to change here?

thanks in advance