diff --git a/IPython/html/notebookapp.py b/IPython/html/notebookapp.py
index 5e55e1d68..9df60d121 100644
--- a/IPython/html/notebookapp.py
+++ b/IPython/html/notebookapp.py
@@ -1061,6 +1061,11 @@ class NotebookApp(BaseIPythonApplication):
threading.Thread(target=b).start()
self.io_loop = ioloop.IOLoop.current()
+ if sys.platform.startswith('win'):
+ # add no-op to wake every 5s
+ # to handle signals that may be ignored by the inner loop
+ pc = ioloop.PeriodicCallback(lambda : None, 5000)
+ pc.start()
try:
self.io_loop.start()
except KeyboardInterrupt: