diff --git a/install/lib/class.FroxlorInstall.php b/install/lib/class.FroxlorInstall.php
index dc67120f..4884a87e 100644
--- a/install/lib/class.FroxlorInstall.php
+++ b/install/lib/class.FroxlorInstall.php
@@ -333,18 +333,18 @@ class FroxlorInstall
 
 		// test if we can store the userdata.inc.php in ../lib
 		$userdata_file = dirname(dirname(dirname(__FILE__))) . '/lib/userdata.inc.php';
-		if ($fp = @fopen($userdata_file, 'w')) {
-			$result = @fputs($fp, $userdata, strlen($userdata));
+		if (@touch($userdata_file) && @chmod($userdata_file, 0400) && @is_writable($userdata_file)) {
+			$fp = @fopen($userdata_file, 'w');
+			@fputs($fp, $userdata, strlen($userdata));
 			@fclose($fp);
 			$content .= $this->_status_message('green', 'OK');
-			chmod($userdata_file, 0440);
 		} else {
 			// try creating it in a temporary file
-			$temp_file = tempnam(sys_get_temp_dir(), 'fx');
-			if (touch($temp_file)) {
+			$temp_file = @tempnam(sys_get_temp_dir(), 'fx');
+			if ($temp_file) {
 				chmod($temp_file, 0400);
 				$fp = @fopen($temp_file, 'w');
-				$result = @fputs($fp, $userdata, strlen($userdata));
+				@fputs($fp, $userdata, strlen($userdata));
 				@fclose($fp);
 				$content .= $this->_status_message('orange', sprintf($this->_lng['install']['creating_configfile_temp'], $temp_file));
 			} else {
@@ -568,7 +568,7 @@ class FroxlorInstall
 			for ($i = 0; $i < sizeof($sql_query); $i ++) {
 				if (trim($sql_query[$i]) != '') {
 					try {
-						$result = $db->query($sql_query[$i]);
+						$db->query($sql_query[$i]);
 					} catch (\PDOException $e) {
 						$content .= $this->_status_message('red', $e->getMessage());
 						$fatal_fail = true;
@@ -735,7 +735,7 @@ class FroxlorInstall
 			}
 
 			if ($do_backup) {
-				$command = $mysql_dump . " " . escapeshellarg($this->_data['mysql_database']) . " -u " . escapeshellarg($this->_data['mysql_root_user']) . " --password='" . $this->_data['mysql_root_pass'] . "' --result-file=" . $filename;
+				$command = $mysql_dump . " " . escapeshellarg($this->_data['mysql_database']) . " -u " . escapeshellarg($this->_data['mysql_root_user']) . " --password='" . escapeshellarg($this->_data['mysql_root_pass']) . "' --result-file=" . $filename;
 				$output = exec($command);
 				if (stristr($output, "error")) {
 					$content .= $this->_status_message('red', $this->_lng['install']['backup_failed']);