Today, I experienced the issue "Unable to launch the IIS Express Web Server" while I was running my Visual Studio 2012. So I considered imparting how to determine that issue.

Since we needed to do a "Get the Latest files from the server". (We are using TFS.) Then when I run my application I was getting this problems. The reason for this error is, somebody has checked in the solution file with his port number (the port number he was using).

When I took the most recent, it was situated in my answer record too. We must take the latest solution file only when it is required. So here I will impart the solution for the first issue.

1. Right-click on your solution and select Properties as indicated in the following picture:

2. Choose “Web” from the left menu.

3. Under the “Use local IIS server” change the port number from http://localhost:58030/ to another one.   

4. In this example, I’ve changed http://localhost:58030/ to http://localhost:58031/

5. Now run again your Apps. The issue will be solved. I Hope it works for you!

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