Index: utils/lit/lit/TestRunner.py
===================================================================
--- utils/lit/lit/TestRunner.py
+++ utils/lit/lit/TestRunner.py
@@ -607,7 +607,12 @@
                 if not recursive:
                     stderr.write("Error: %s is a directory\n" % path)
                     exitCode = 1
-                shutil.rmtree(path, onerror = on_rm_error if force else None)
+                if platform.system() == 'Windows':
+                    import ctypes
+                    path = os.path.abspath(path)
+                    ctypes.windll.kernel32.RemoveDirectoryW(r'\\?\%s' % path)
+                else:
+                    shutil.rmtree(path, onerror = on_rm_error if force else None)
             else:
                 if force and not os.access(path, os.W_OK):
                     os.chmod(path,