PTC Windchill Solutions won't start with Error "Could not connect to net.tcp://:/Relex.Security/IAccessManager"

Problem: Message "Could not connect to net.tcp://<host-name>:<port>/Relex.Security/IAccessManager" appears when launching PTC 

Solution: The PTC Forums describe the issue at Document CS192106, however, the issue for me turned out to be that not all the PTC Windchill Services were running. 

To check: Click the windows button and type "services.msc" in the services window go down to the main PTC serices: Alert Services, Long Running Task Service, Object Broker Services, Search Indexer Service, and make sure they are all started