title: Can't run python on powershell
body: <p>When I type python in PowerShell I get an error like:</p>
  
  <pre><code>Program 'python' failed to execute: The system cannot find the file specified
  At line:1 char:11
  + python.exe &lt;&lt;&lt;&lt; .
  At line:1 char:1
  +  &lt;&lt;&lt;&lt; python.exe
      + CategoryInfo          : ResourceUnavailable: (:) [], ApplicationFailedException
      + FullyQualifiedErrorId : NativeCommandFailed
  </code></pre>
  
  <p>I have added C:\Python27 and its sub directories to PATH. I can run it by typing python.exe. Can run scripts the same way.</p>
  
  <p>I installed Python 2.7.11 64 bit.</p>