Hi. I joined this site the other day and have found it an invaluable source of great information. Moonbat's tutorials are excellent and I have learned a great deal however: I downloaded Wireshark for my laptop which is running Vista. Everything was cool and as it should be until I downloaded the new pcap driver 4.0.2. Since I've installed this when I open Wireshark I get a message telling me that the NPF driver isn't running. I followed some instructions to check the netgroup packet filter in my hidden files but it's not there?! What have I done wrong and how can I sort it? Many kind regards to you all, Magoo.