title: VSIXInstaller showing error message and not installing .VSIX files
body: <p>I am trying to install the SQLite SDK for building Windows 8.1 desktop and mobile Application.<br/>
  The issue i faced is that when i downloaded the SDK it was with .VSIX extension.<br/> 
  I have tried opening it by:<br/>
  1.Double clicking directly.<br/>
  2.With Visual Studio Selector.
  3.Developer Command Prompt ( both normal and elevator command ).<br/>
  4.Running the VSIXInstaller.exe as an administrator from C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE <br/></p>
  
  <p>Nothing happens. It is not installing. <br/>
  But when i open the VSIXInstaller.exe with administrator, it is showing me this ( the image is shown below ).</p>
  
  <p><a href="https://i.stack.imgur.com/tP4D9.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tP4D9.png" alt="VSIXInstaller.exe_image"></a></p>
  
  <p>I am running Windows 10 Pro with Visual Studio 2015 Pro.</p>