--- moodle/install.php 

+++ moodle/install.php 

@@ -171,18 +171,18 @@

     $INSTALL['wwwrootform'] = $INSTALL['wwwroot'];

     // now try to guess the correct dataroot not accessible via web

-    $CFG->wwwroot = $INSTALL['wwwroot'];

-    $i = 0; //safety check - dirname might return some unexpected results

-    while(is_dataroot_insecure()) {

-        $parrent = dirname($CFG->dataroot);

-        $i++;

-        if ($parrent == '/' or $parrent == '.' or preg_match('/^[a-z]:\\\?$/i', $parrent) or ($i > 100)) {

-            $CFG->dataroot = ''; //can not find secure location for dataroot

-            break;

-        }

-        $CFG->dataroot = dirname($parrent).'/moodledata';

-    }

-        $INSTALL['dataroot'] = $CFG->dataroot;

+//    $CFG->wwwroot = $INSTALL['wwwroot'];

+//   $i = 0; //safety check - dirname might return some unexpected results

+//    while(is_dataroot_insecure()) {

+//        $parrent = dirname($CFG->dataroot);

+//        $i++;

+//        if ($parrent == '/' or $parrent == '.' or preg_match('/^[a-z]:\\\?$/i', $parrent) or ($i > 100)) {

+//            $CFG->dataroot = ''; //can not find secure location for dataroot

+//            break;

+//        }

+//        $CFG->dataroot = dirname($parrent).'/moodledata';

+//    }

+//        $INSTALL['dataroot'] = $CFG->dataroot;

 }

 $headstagetext = array(WELCOME       => get_string('chooselanguagehead', 'install'),