Issue #2099671 by salvis: Fixed Windows 7 and MTimeProtectedFileStorage has problems.

core/lib/Drupal/Component/PhpStorage/FileStorage.php

@@ -133,8 +133,8 @@ public function deleteAll() {
    */
   protected function unlink($path) {
     if (file_exists($path)) {
-      // Ensure the file / folder is writable.
       if (is_dir($path)) {
+        // Ensure the folder is writable.
         @chmod($path, 0777);
         foreach (new \DirectoryIterator($path) as $fileinfo) {
           if (!$fileinfo->isDot()) {
@@ -143,6 +143,8 @@ protected function unlink($path) {
         }
         return @rmdir($path);
       }
+      // Windows needs the file to be writable.
+      @chmod($path, 0700);
       return @unlink($path);
     }
     // If there's nothing to delete return TRUE anyway.