When a Client Task Server is uninstalled and then reinstalled on a Package Server, it leaves the services Stopped for the Default Website in IIS.
Running Debug level logging on the Package Server doesn't report any problem with the uninstall or re-install. The only indication that there is a issue is found the the Application Event log. A RestartService command is sent, but no subsequent "Service started Successfully" is logged for the w3svc service. There is no message in the Event logs that IIS has restarted.