title: Failed to run conda install -c menpo opencv3=3.2.0 in Windows7
body: <p>I want to update opencv from 3.1.0 to 3.2.0</p>
  
  <p>I run "conda install -c menpo opencv3=3.1.0" to install opencv 3.1.0</p>
  
  <p>when I run "conda install -c menpo opencv3=3.2.0", I got error.</p>
  
  <pre><code>C:\Users\eason&gt;conda install -c menpo opencv3=3.2.0
  Fetching package metadata .............
  
  
  PackageNotFoundError: Package not found: '' Package missing in current win-64 ch
  annels:
  - opencv3 3.2.0*
  
  You can search for packages on anaconda.org with
  
  anaconda search -t conda opencv3
  </code></pre>
  
  <p><a href="https://anaconda.org/menpo/opencv3" rel="noreferrer">https://anaconda.org/menpo/opencv3</a></p>
  
  <p>When I run "anaconda search -t conda opencv3"...
  <a href="https://i.stack.imgur.com/NLIFd.png" rel="noreferrer"><img src="https://i.stack.imgur.com/NLIFd.png" alt="enter image description here"></a></p>
  
  <p>I found opencv3=3.2.0 , but I can't install it?</p>
  
  <p>Is anyone helps ?  thanks!</p>