diff --git a/websockify/websockifyserver.py b/websockify/websockifyserver.py
index 055bb12..4b1fbb0 100644
--- a/websockify/websockifyserver.py
+++ b/websockify/websockifyserver.py
@@ -37,6 +37,9 @@ for mod, msg in [('ssl', 'TLS/SSL/wss is disabled'),
 if sys.platform == 'win32':
     # make sockets pickle-able/inheritable
     import multiprocessing.reduction
+    # the multiprocesssing module behaves much differently on Windows,
+    # and we have yet to fix all the bugs
+    sys.exit("Windows is not supported at this time")
 
 from websockify.websocket import WebSocket, WebSocketWantReadError, WebSocketWantWriteError
 from websockify.websocketserver import WebSocketRequestHandler