title: Visual studio slow on keyboard, keyboard lag and randomly duplicating keystrokes from keyboard input
body: <p>As I type in visual studio keyboard input gets duplicated.</p>
  
  <p>ex: if I type <code>return</code> it ends up <code>rreturn</code> or <code>retturn</code></p>
  
  <p>ex2: when hitting backspace it sometimes delets 2 spaces back instead of 1.</p>
  
  <p>ex3: presing SHIFT + 9 should result in '<code>)</code>' but results in <code>'9'</code> as if I didn't press the SHIFT key.</p>
  
  <p>Also typing is randomly slow, I type faster than characters get echoed in the editor.
  This not only happens in editor but anywhere else, ie. typing something into properties, such as linker input, or just any dialog that expects keyboard input. typing lags and duplicates keystrokes.</p>
  
  <p>Thing I have tried so far:</p>
  
  <pre><code>Tools &gt; options &gt; environment &gt; automatically adjust visual experience... toggle on and off as well as 2 checkboxes below toggling on and off.
  Tools &gt; options &gt; text editor &gt; all languages &gt; disable codelens
  Tools &gt; options &gt; environment &gt; international settings &gt; same as MS Windows
  Tools &gt; options &gt; source control &gt; set to none
  setting up precompiled headers
  disabling all extension, run devenv in safe mode
  tools &gt; options &gt; text editor &gt; C/C++ &gt; experimental &gt; disable code analysis.
  reinstalling Visual Studio and OS
  </code></pre>
  
  <p>Nothing works.</p>
  
  <p>Visual Studio 2017 v15.9.9 /
  Windows 10 Pro x64</p>
  
  <p>all up to date, keyboard works just fine in other programs.</p>
  
  <p><strong>Edit:</strong>
  disabling intelisense solves the problem but without it is impossible to code, are there any options to speed up intelisense? obviously the issue is intelisense.</p>