This is because win7 default NPF service is closed, you need to open this service as an administrator
When installing wireshark on Windows 7, you will encounter the situation that the NPF driver cannot be started. Generally, you can start normally if you use the administrator method, or install NPF as a service method, then the problem is OK
The steps to start the NPF driver as an administrator are:
Start -> Accessories -> cmd (right click and browse to start as administrator) -> command net start npf
The faster way is:
Press the windows logo key -> keyboard input cmd (at this time, after pressing the logo key, the search bar under the window will enter the cmd you typed), search for cmd, -> simultaneously press ctrl+shift+enter—>Connect What comes down is whether the pop-up is run as an administrator, everything is OK