title: High CPU Usage by IIS even after I stop all the websites
body: <p>I have an Asp.Net MVC 5.1 website on a VPS and until a few days ago everything went perfectly without any problems. It has 4 GB of RAM, quad core CPU (3 GHz) and a SSD for Windows drive (currently 10 GB free space) so I don't think it's a hardware issue.
  The problem started after I installed the <em>Wordpress</em> using the Web Platform Installer but that might be just a coincidence.
  When I restart the VPS everything is smooth. After couple of hours the CPU usage of <code>w3wp.exe</code> goes to 100% and never comes down. I stopped all the websites running and waited for a few minutes and it's still at 100% so I'm sure it's not any of the websites. Is there any way for me to troubleshoot where the problem is coming from? Can you guess where I should start?</p>
  <h3>Update:</h3>
  <p>I restarted the <code>DefaultApplicationPool</code> in the server which was related to one of the websites running on the server and it immediately dropped the CPU usage of the IIS to 3. I started it again and it's now going on 3% CPU and the website is fully functional. I think it'll go to 100% soon though!</p>