title: pip install fails with "connection error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:598)"
body: <p>I am very new to Python and trying to <code>&gt; pip install linkchecker</code> on Windows 7. Some notes:</p>
  <ul>
  <li>pip install is failing no matter the package. For example, <code>&gt; pip install scrapy</code> also results in the SSL error.</li>
  <li>Vanilla install of Python 3.4.1 included pip 1.5.6. The first thing I tried to do was install linkchecker. Python 2.7 was already installed, it came with ArcGIS. <code>python</code> and <code>pip</code> were not available from the command line until I installed 3.4.1.</li>
  <li><code>&gt; pip search linkchecker</code> works. Perhaps that is because pip search does not verify the site's SSL certificate.</li>
  <li>I am in a company network but we do not go through a proxy to reach the Internet.</li>
  <li>Each company computer (including mine) has a Trusted Root Certificate Authority that is used for various reasons including enabling monitoring TLS traffic to <a href="https://google.com" rel="noreferrer">https://google.com</a>. Not sure if that has anything to do with it.</li>
  </ul>
  <p>Here are the contents of my <strong>pip.log</strong> after running <code>pip install linkchecker</code>:</p>
  <pre class="lang-none prettyprint-override"><code>Downloading/unpacking linkchecker
    Getting page https://pypi.python.org/simple/linkchecker/
    Could not fetch URL https://pypi.python.org/simple/linkchecker/: connection error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:598)
    Will skip URL https://pypi.python.org/simple/linkchecker/ when looking for download links for linkchecker
    Getting page https://pypi.python.org/simple/
    Could not fetch URL https://pypi.python.org/simple/: connection error: HTTPSConnectionPool(host='pypi.python.org', port=443): Max retries exceeded with url: /simple/ (Caused by &lt;class 'http.client.CannotSendRequest'&gt;: Request-sent)
    Will skip URL https://pypi.python.org/simple/ when looking for download links for linkchecker
    Cannot fetch index base URL https://pypi.python.org/simple/
    URLs to search for versions for linkchecker:
    * https://pypi.python.org/simple/linkchecker/
    Getting page https://pypi.python.org/simple/linkchecker/
    Could not fetch URL https://pypi.python.org/simple/linkchecker/: connection error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:598)
    Will skip URL https://pypi.python.org/simple/linkchecker/ when looking for download links for linkchecker
    Could not find any downloads that satisfy the requirement linkchecker
  Cleaning up...
    Removing temporary dir C:\Users\jcook\AppData\Local\Temp\pip_build_jcook...
  No distributions at all found for linkchecker
  Exception information:
  Traceback (most recent call last):
    File &quot;C:\Python34\lib\site-packages\pip\basecommand.py&quot;, line 122, in main
      status = self.run(options, args)
    File &quot;C:\Python34\lib\site-packages\pip\commands\install.py&quot;, line 278, in run
      requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle)
    File &quot;C:\Python34\lib\site-packages\pip\req.py&quot;, line 1177, in prepare_files
      url = finder.find_requirement(req_to_install, upgrade=self.upgrade)
    File &quot;C:\Python34\lib\site-packages\pip\index.py&quot;, line 277, in find_requirement
      raise DistributionNotFound('No distributions at all found for %s' % req)
  pip.exceptions.DistributionNotFound: No distributions at all found for linkchecker
  </code></pre>