I just ran the following command:
pip install -U steem
and the installation worked well until it failed to install pycrypto. Aft
pycrypto
On Windows, I strongly recommand installing latest Visual Stuido Community, it's free, you will maybe miss some build tools if you only install vc_redist, so you can easily install package by pip instead of wheel, it save lot of time
Visual Stuido Community
vc_redist
pip
wheel