Process with an ID ???? is not running in visual studio 2015

Possible Solution 1: 

• Close VS.
• Navigate to the folder of the solution and delete the hidden .vs folder.
• Restart VS.
• Hit F5 and IIS Express should load as normal, allowing you to debug.

Possible Solution 2: 

• Close all instances of Visual Studio
• Rename the IISExpress folder (in my PC is in C:\Users\jmelosegui\Documents)
• Add the _CSRUN_DISABLE_WORKAROUNDS Environment System variable with the value of 1. Here is how.
• Start Visualstudio in administrator mode

Possible Solution 3:

• open vs as an administrator
• right click project and click on unload project
• again right click project and click on open edit.... csproj
• find the code below and delete it $

  <DevelopmentServerPort>63366</DevelopmentServerPort>
  <DevelopmentServerVPath>/</DevelopmentServerVPath>
  <IISUrl>http://localhost:63366/</IISUrl>
  

• save and close the file .csproj
• right click project and reload it

Source : https://stackoverflow.com/questions/26424902/process-with-an-id-is-not-running-in-visual-studio-professional-2013-update