diff -r d4190ed586a4 Lib/multiprocessing/forking.py
--- a/Lib/multiprocessing/forking.py    Wed Feb 03 05:19:44 2016 +0000
+++ b/Lib/multiprocessing/forking.py    Fri Feb 26 17:34:42 2016 -0600
@@ -405,7 +405,8 @@
         if _logger is not None:
             d['log_level'] = _logger.getEffectiveLevel()

-        if not WINEXE and not WINSERVICE:
+        if not WINEXE and not WINSERVICE and \
+           not d['sys_argv'][0].lower().endswith("pythonservice.exe"):
             main_path = getattr(sys.modules['__main__'], '__file__', None)
             if not main_path and sys.argv[0] not in ('', '-c'):
                 main_path = sys.argv[0]