When I had this, it was due to a MS process running on this port. I solved this problem by changing ports.
Modify the C:\Program Files\QlikView\Publisher\CommandCenterService\QVPublisherCommandCenterService.exe.config file and modify the value from 8081 to 8137
<add key="WebservicePort" value="8137" />
Modify the C:\Program Files\QlikView\Publisher\ControlPanel\Web.Config file and make the following change from 8081 to 8137:
<add key="CommandCenterURL" value="http://localhost:8137/qtcc.asmx"/>