Are you getting the error message: There was an error while performing this operation. Details: Application pool “<name>” cannot be deleted because it contains 1 applications?

The only way I could figure out how to delete it was using Powershell.

Here are the Powershell commands:

1. import-module WebAdministration
2. iis:
3. ls *optional* This just shows you the AppPools folder exists
4. cd AppPools
5. dir
6. del *name_of_Web_Pool*
7. Will ask you if you really do want to remove the App Pool. “Hit A for “Yes to all”.
8. ls – This will allow you to verify the AppPool is gone.

You can now go back into IIS and verify that the AppPool is no longer there!