ASP.NET - Unable to start debugging on the web server. The IIS worker process for the launched URL is not currently running.

Finished your coding and going to run your project.
As soon as you press F5 to debug the project, you get an error:

Unable to start debugging on the web server. The IIS worker process for the launched URL is not currently running.

and it wont allow you to debug your application.

Here is the solution to resolve the problem

• Open your Internet Information Server
• Expand your computer/ server
• Expand Sites
• Select you website.
• In Content View, double click Authentication. 
• Verify that Windows Authentication is Enabled, if not enable it form Actions window (in the right site)

In your project, press F5 and your debug will start.

// Alpesh Shah