What web server are you running? In case you are running IIS, then we might be able to help you. However, in case you are using third-party web service such as Apache , you need to check with them and normally you have to update them.
Updates are current. I don't have any Web Apps running on the workstation. I know WAC opens a browser window. Does it need IIS? The ticket from Nessus identifies the fault being seen at TCP port 6516, a typical WAC installation setup. If I stop IIS will that remove the error?
Yes, Windows Admin Center. I got lazy. I'll stop the IIS service and see if that eliminates the message. That is a good idea to contact Nessus. It may be a false positive. I've been running WAC for quite a while and this is the first time it got flagged. Thanks for your help.