If your Event log contains:

        Event ID: 113                                      Source: W3SVC                                      Type: Warning                                      Category: NoneDescription: Instance 1 has invalid binding descriptor X                                       Event ID: 115                                      Source: W3SVC                                      Type: Error                                      Category: None                                      Description: The service could not bind instance 1. The data is the error code.
you have invalid information in the IIS metabase at SecureBindings.

To fix this, type:

%SystemRoot%\System32\Inetsrv\Adminsamples\adsutil set w3svc/1/SecureBindings :443:

NOTE: You can replace 443 with another port number.