Why do I see "The NPF driver isn't running. You may have trouble capturing or listing interfaces." when starting Wireshark?

When I start up Wireshark, why do I see this message?

"The NPF driver isn't running. You may have trouble capturing or listing interfaces."

Answer

You need to run Wireshark with administrator privileges.

1. Exit Wireshark.


2. Find Wireshark on the Start Menu.


3. Right-click on it.


4. Select "Run as administrator",


5. Click "Yes" in the user account control dialog.