How to install pycrypto mode in windows ?!

I am using python 2.6 and i had installed paramiko module which needs pycrypto but ,
when i am installing pycrypto in windows its giving error as follows:


creating build\lib.win32-2.6\Crypto\Publ icKey
copying .\PublicKey\DSA .py -> build\lib.win32-2.6\Crypto\Publ icKey
copying .\PublicKey\ElG amal.py -> build\lib.win32-2.6\Crypto\Publ icKey
copying .\PublicKey\pub key.py -> build\lib.win32-2.6\Crypto\Publ icKey
copying .\PublicKey\qNE W.py -> build\lib.win32-2.6\Crypto\Publ icKey
copying .\PublicKey\RSA .py -> build\lib.win32-2.6\Crypto\Publ icKey
copying .\PublicKey\__i nit__.py -> build\lib.win32-2.6\Crypto\Publ icKey
running build_ext
building 'Crypto.Hash.MD 2' extension
error: Unable to find vcvarsall.bat

can u suggest any source to get pycrypto to avoid such events?!