The error:

Processing cron function for search....
--DELETE----
<br />
<b>Warning</b>: require_once(Zend/Search/Lucene/Exception.php) [<a href='function.require-once'>function.require-once</a>]: failed to open stream: No such file or directory in <b>E:\Website Files\moodle\search\Zend\Search\Lucene.php</b> on line <b>22</b><br />
<br />
<b>Fatal error</b>: require_once() [<a href='function.require'>function.require</a>]: Failed opening required 'Zend/Search/Lucene/Exception.php' (include_path='E:\Website Files\moodle;search;E:\Website Files\moodle/lib/pear;.;C:\php5\pear') in <b>E:\Website Files\moodle\search\Zend\Search\Lucene.php</b> on line <b>22</b><br />

Caused by the include path having a ; in it instead of a \.

Fix:

Line 28 of /search/delete.php should read:

ini_set('include_path', $CFG->dirroot.'\search'.PATH_SEPARATOR.ini_get('include_path'));