title: Updating scikit-learn to latest version with Anaconda environment fails with http error 000
body: <p>I use Anaconda3 installed on my pc Win10 64bits.</p>
  <p>I noticed it runs with an outdated scikit learn version (0.21.3),
  and I am trying to update it (0.24.1 available on <a href="https://repo.anaconda.com/pkgs/main/win-64/" rel="nofollow noreferrer">https://repo.anaconda.com/pkgs/main/win-64/</a>)</p>
  <p>I do this:</p>
  <ol>
  <li>cmd</li>
  <li>I go in the script directory D:\ProgramData\Anaconda3\Scripts</li>
  <li>conda update scikit-learn</li>
  </ol>
  <p>it fails with this error message:</p>
  <pre><code>ProgramData\Anaconda3\Scripts&gt;conda update scikit-learn
  Collecting package metadata (current_repodata.json): failed
  
  CondaHTTPError: HTTP 000 CONNECTION FAILED for url &lt;https://repo.anaconda.com/pkgs/main/win-64/current_repodata.json&gt;
  Elapsed: -
  
  An HTTP error occurred when trying to retrieve this URL.
  HTTP errors are often intermittent, and a simple retry will get you on your way.
  
  If your current network has https://www.anaconda.com blocked, please file
  a support request with your network engineering team.
  
  'https://repo.anaconda.com/pkgs/main/win-64'
  </code></pre>
  <p>It is my personal PC,
  I have access to websites:
  <a href="https://www.anaconda.com" rel="nofollow noreferrer">https://www.anaconda.com</a>
  and
  <a href="https://repo.anaconda.com/pkgs/main/win-64/" rel="nofollow noreferrer">https://repo.anaconda.com/pkgs/main/win-64/</a>
  from my webbrowser chrome, without any problem.</p>
  <p>So what could be wrong here ?
  How can I update sucessfully ?</p>
  <p>I can download the files from <a href="https://repo.anaconda.com" rel="nofollow noreferrer">https://repo.anaconda.com</a> by hand if necessary, but how to install it ?</p>