Run / cmd / netstat -aon | find "port"
if there is nothing in the list, no program is running on that port
if there is something in the list it will also show in taskmanager. if you add PID you can see all id`s that are beeng used and se what program that is running it.
So for exemple if you are using radio via your netbrowser og skype, that can interfere with consignor