When I start Wireshark, sometimes I’m unable to select the network interface to be used to analyze network traffic. I was able to resolve this by restarting a service called “NetGroup Packet Filter Driver“. Please note, this service can not be found in “Computer Management > Services“.
The procedure below can be followed to resolve this:
- Open a Command Prompt with administrative privileges.
- Execute the command: “sc query npf” and verify if the service is running.
- Execute the command: “sc stop npf” followed by the command: “sc start npf“.
- Open WireShark and press “F5“
Hope this helps!