I'd just installed py3.5 most recent (downloaded, installed 11/23/15) and when starting via the windows start (win 8.1pro) shortcut, I always get this error.
I'd navigated to the program directory (it installed in C:\Users\my-ID\AppData\Local\Programs\Python\Python35) and started the python.exe and that fails as well. (as does pythonw.exe -silently. nothing even pops!) -- https://mail.python.org/mailman/listinfo/python-list