Fixed spelling error

setup/inc/file-unclean.inc.php

@@ -4,7 +4,7 @@ if(!defined('SETUPINC')) die('Kwaheri!');
     <div id="main">
             <h1 style="color:#FF7700;"><?php echo __('osTicket is already installed?');?></h1>
             <div id="intro">
-             <p><?php echo sprintf(__('Configuration file already changed - which could mean osTicket is already installed or the config file is currupted. If you are trying to upgrade osTicket, then go to %s Admin Panel %s.'), '<a href="../scp/admin.php" >', '</a>');?></p>
+             <p><?php echo sprintf(__('Configuration file already changed - which could mean osTicket is already installed or the config file is corrupted. If you are trying to upgrade osTicket, then go to %s Admin Panel %s.'), '<a href="../scp/admin.php" >', '</a>');?></p>
 
              <p><?php echo __('If you believe this is in error, please try replacing the config file with a unchanged template copy and try again or get technical help.');?></p>
              <p><?php echo sprintf(__('Refer to the %s Installation Guide %s on the wiki for more information.'), '<a target="_blank" href="http://osticket.com/wiki/Installation">', '</a>');?></p>