title: Anaconda : Update conda failed because permission error
body: <p>I'm using Anaconda version 5.1 on Windows 7 (64bit).</p>
  
  <p>I have tried to update conda from 4.4.10-py36_0 to 4.4.11-py36_0 but cannot and got error message</p>
  
  <blockquote>
    <p>(base) C:\Windows\system32>conda update -n base conda Solving
    environment: done</p>
    
    <h2>Package Plan</h2>
    
    <p>environment location: C:\ProgramData\Anaconda3</p>
    
    <p>added / updated specs:
        - conda</p>
    
    <p>The following packages will be downloaded:</p>
  
  <pre><code>package                    |            build
  ---------------------------|-----------------
  conda-4.4.11               |           py36_0         955 KB
  </code></pre>
    
    <p>The following packages will be UPDATED:</p>
  
  <pre><code>conda: 4.4.10-py36_0 --&gt; 4.4.11-py36_0
  </code></pre>
    
    <p>Proceed ([y]/n)? y</p>
    
    <p>Downloading and Extracting Packages conda 4.4.11:</p>
    
    ################################################### | 100% Preparing transaction: done Verifying transaction: done Executing
    
    <p>transaction: failed ERROR conda.core.link:_execute(481): An error
    occurred while uninstalling packag e 'defaults::conda-4.4.10-py36_0'.
    PermissionError(13, 'The process cannot access the file because it is
    being used  by another process') Attempting to roll back.</p>
    
    <p>Rolling back transaction: done</p>
    
    <p>PermissionError(13, 'The process cannot access the file because it is
    being used  by another process')</p>
  </blockquote>
  
  <p>I uninstalled and re-installed it but got the same issue.</p>