Well firstly being windows I assume that you did a restart after install. Python.org python doesn't come with the windows extensions which can be installed separately.
On windows I use winpython is totally portable and can be installed as system version includes all extensions as well as Numpy and matplotlib etc which can be a bit tricky to install otherwise. There is enthought and anaconda packaged python a well but my choice is winpython Give it a try and you'll definitely have a working system version. Sayth -- https://mail.python.org/mailman/listinfo/python-list
