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Wireshark: The NPF driver isn’t running

On Windows 7 ultimate x64, as soon as I launched Wireshark 1.2.10 got a message saying “The NPF driver isn’t running”. I tried starting NPF service from command prompt using “net start npf”, this time got a “Access is denied” message.

So to fix this error you need to start NPF service manually from an elevated command prompt by running command prompt as an administrator and using the command “net start npf”.

Alternatively, you can also fix this issue by running Wireshark as an administrator.

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