The NPF driver isn’t running
If you installed Wireshark and, in fear of installing another service that might slow down your computer’s start-up time, you choose to have that service start on demand, but then when you start Wireshark you see the message ‘The NPF driver isn’t running’
This is simply because it isn’t running! To start it, open an administrator command prompt and type in ‘sc start npf’
That’s all!