diff --git a/src/calibre/devices/mtp/windows/content_enumeration.cpp b/src/calibre/devices/mtp/windows/content_enumeration.cpp
index 56150bff85..f9026c35f8 100644
--- a/src/calibre/devices/mtp/windows/content_enumeration.cpp
+++ b/src/calibre/devices/mtp/windows/content_enumeration.cpp
@@ -209,9 +209,7 @@ static PyObject* bulk_get_filesystem(IPortableDevice *device, IPortableDevicePro
 
     callback->thread_state = PyEval_SaveThread();
     while (TRUE) {
-        Py_BEGIN_ALLOW_THREADS;
         wait_result = MsgWaitForMultipleObjects(1, &(callback->complete), FALSE, 60000, QS_ALLEVENTS);
-        Py_END_ALLOW_THREADS;
         if (wait_result == WAIT_OBJECT_0) {
             break; // Event was signalled, bulk operation complete
         } else if (wait_result == WAIT_OBJECT_0 + 1) { // Messages need to be dispatched
diff --git a/src/calibre/devices/mtp/windows/remote.py b/src/calibre/devices/mtp/windows/remote.py
index 13e15764b2..a6502b991b 100644
--- a/src/calibre/devices/mtp/windows/remote.py
+++ b/src/calibre/devices/mtp/windows/remote.py
@@ -70,6 +70,7 @@ def main():
         print ('Connected to:', dev.get_gui_name())
         print ('Total space', dev.total_space())
         print ('Free space', dev.free_space())
+        pprint.pprint(dev.dev.get_filesystem(dev._main_id))
     finally:
         dev.shutdown()