title: Getting errors E1696 with all headers in Visual Studio 2017
body: <p>I was trying to make a window with GLFW, GLEW and OpenGL but once I wanted to upload to GitHub one file called "Browse.VC.db" was too big. So I deleted it (I know now that this was stupid idea :) ). And after deleting, VS shows buch of errors of number E1696 like:</p>
  
  <pre><code>E1696 cannot open source file "GL/glu.h"
  E1696 cannot open source file "stddef.h"
  E1696 cannot open source file "stdint.h"
  E1696 cannot open source file "iostream"
  E1696 cannot open source file "string"
  </code></pre>
  
  <p>and many many more.
  Also I am getting errors E0020 identifier "unint64_t" is undefined and E0135 namespace "std" has no member "string" but I think that is because of E1696 errors.</p>
  
  <p>I am running Visual Studio 2017 on Windows 10. I am using Version 10.0.17763.0 of Windows SDK and I am not using precompiled headers.</p>
  
  <p>I tried changing Windows SDK version to 8.1 but I does not work. I checked if I installed Windows Universal C Runtime SDK but it does not work too.</p>
  
  <p>I found lot of tutorials but they were about problems with projects upgraded from older VS to newer one.</p>
  
  <p>This is how I am including headers in .h filed:</p>
  
  <pre><code>#pragma once
  #include &lt;IO/Log.h&gt;
  
  #include &lt;iostream&gt;
  #include &lt;fstream&gt;
  #include &lt;string&gt;
  </code></pre>