A request to allocate an ephemeral port number from the global UDP port space has failed due to all such ports being in use.
Use netstat -anob
Look for several dnscache entries
Find PID number for the dnscache service:
tasklist /SVC|find /i “dns”
Kill the pid:
TASKKILL /PID <PID process number> /F
Remember to start the other serviecs used by that pid (as it is controlled by svchost.exe)