Make sure you choose the option to install the NPF as a service during the install prompts.

Right click on the install and click on “Run as Administrator”.

In the properties window, click on the compatibility tab and change the option for “Run this program in compatibility mode for” to “ Windows Vista (Service Pack 2)” and click on OK.Right click on the install file (I happened to download the 64 bit install) and click on properties.Here are the steps to install Wireshark on Windows 7. I solved it by enabling compatibility mode on the install executable. Essentially, Windows was blocking the install of WinPcap (network capture driver). As part of installing my standard set of tools, I tried to install Wireshark (open source network capture tool), and ran into an error due to the UAC security settings.

I recently upgraded my laptop to Windows 7 RC from the beta version I was testing earlier. Looks like the issue was with the drivers not being signed digitally. This release includes WinPcap 4.1.1, which has support for Windows. Wireshark works without any issues as of version 1.2.3.

Wireshark windows vista