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If you press Ctrl-C during Python startup on Windows you may get interpreter crashes with different Python tracebacks displayed on the standard system error output stream.
Reproduced using:
 - Windows 7 SP1 x64
 - Python 3.3.3 (64-bit) as downloaded from 'http://www.python.org/download/releases/3.3.3' (but seen with different earlier Python versions as well).
 - either a non-trivial Python script, one containing only a '#! python3' shabang line, or a completely empty one
 - default site.py
To reproduce simply run the Python interpreter with a prepared Python script as input and press Ctrl-C immediately afterwards.
Possible results:
 * Script finishes before your Ctrl-C kicks in.
 * You get a clean KeyboardInterrupt traceback and the script exits.
 * You get a KeyboardInterrupt traceback and the interpreter process crashes.
I'm attaching more detailed information on specific crash instances.
For some more information & background see the devel mailing list thread started at: 'https://mail.python.org/pipermail/python-dev/2013-December/130750.html'.