Hi,
You could update the driver and firmare for the network adapter. Also check the installed third party applications. A same problem caused by wireshark here
https://social.technet.microsoft.com/Forums/en-US/a333d93f-8f73-413f-b074-b5dc922a8ddf/hyperv-error-applying-virtual-switch-properties-changes-adding-ports-to-the-switch-external?forum=win10itprovirt
Best Regards,
Ian