Thanks for the help. I now have Wireshark 1.2.1 running on my Win 7 x64 RTM. I initially got the "This version of Windows is not supported by WinPcap 4.1 beta5." error when installing Wireshark. Then I installed WinPcap 4.0.2, but this resulted in the "Dumpcap has stopped working." error. The fix was very simple: Run the WinPcap 4.1 beta5 setup with Vista SP2 compatibility. So I guess DigeratiPrime can update the fix for the "Dumpcap has stopped working." > Uninstall 4.0.2 and install 4.1 beta 5 with Vista compatibiliy
