Python anaconda access denied : <p>I'm trying to update tensorflow.</p>

<pre><code>pip install --upgrade tensorflow-gpu
</code></pre>

<p>It first checks for the packages and creates the following error</p>

<pre><code>Installing collected packages: markdown, werkzeug, numpy, tensorflow-gpu, setuptools
Found existing installation: Markdown 2.2.0
Uninstalling Markdown-2.2.0:    
PermissionError: [WinError 5] Access is denied: 'c:\\program files\\anaconda3\\lib\\site-packages\\markdown-2.2.0.dist-info\\description.rst'
</code></pre>

<p>I'm not very experienced with Windows, I did all my work on Linux so far, so what do I do here?</p>
