title: How can I install pycrypto on a 64-bit Windows 7 machine?
body: <p>I tried installing PyCrypto using <code>pip</code>, but it complained about needing vcvarsall.bat.  I installed Visual Studio 2008, but now I get <code>ValueError: [u'path']</code> when I try to install it from <code>pip</code>.</p>
  
  <p>I tried downloading a pre-built binary from <a href="http://www.voidspace.org.uk/python/modules.shtml#pycrypto" rel="nofollow">Voidspace</a>, but they only have 32-bit versions, and it doesn't seem to install correctly on my machine (it says it succeeded, but running python and trying <code>import Crypto</code> gives me an <code>ImportError: No module named Crypto</code>).</p>
  
  <p>What do I need to do?</p>