diff -r 463654af6349 Lib/pathlib.py
--- a/Lib/pathlib.py	Mon Feb 10 21:30:42 2014 -0500
+++ b/Lib/pathlib.py	Tue Feb 11 03:00:34 2014 +0000
@@ -1286,3 +1286,15 @@
 
 class WindowsPath(Path, PureWindowsPath):
     __slots__ = ()
+
+    def owner(self):
+        """
+        Unsupported in Windows.
+        """
+        return 0
+
+    def group(self):
+        """
+        Unsupported in Windows.
+        """
+        return 0