I'm using the Windows 8 Developer Preview and wireshark does not appear to function.
I get the error "The NPF driver isn't running. You may have trouble capturing or listing interfaces." when attempting to run it.
Google appears to be full of useless links for this error, so I was hoping I might have some more luck here.
Probably WinPCAP did not install correctly, which is why Wireshark isn't able to capture on your cards. Try deinstalling Wireshark and reinstalling while using the compatibility feature to make the installer think that it is running on Windows 7/Vista: right click and then choose "properties" on the installer, go to the "Compatibility" tab and set it to "Windows 7". After that everything should work.
answered 14 Nov '11, 15:30