VMware Infrastructure Client could not establish the initial connection

After upgrading VMWare Virtual Center to version 2.5, I received a message that read

• VMWare Infrastructure Client could not establish the initial connection

To correct this error, you would need to log onto the VirtualCenter server and make sure that VMWare VirtualCenter Service is running. After I started this service, I was able to connect to the VirtualCenter Server to maintain my guest OSes.