diff --git a/system/helpers/file_helper.php b/system/helpers/file_helper.php
index 3a373ef..a5aabec 100644
--- a/system/helpers/file_helper.php
+++ b/system/helpers/file_helper.php
@@ -145,7 +145,7 @@
 				{
 					delete_files($path.DIRECTORY_SEPARATOR.$filename, $del_dir, $level + 1, $htdocs);
 				}
-				elseif ($htdocs === TRUE && ! preg_match('/^(\.htaccess|index\.(html|htm|php))$/', $filename))
+				elseif ($htdocs === TRUE && ! preg_match('/^(\.htaccess|index\.(html|htm|php)|web\.config)$/i', $filename))
 				{
 					@unlink($path.DIRECTORY_SEPARATOR.$filename);
 				}