Does WinPcap work on Windows Vista?
WinPcap 3.1: The installer is able to correctly detect and install the product on Microsoft Windows Vista Beta1 (x86). However WinPcap has not been fully tested on this newly released operating system, since Windows Vista Beta1 was released less than two weeks before WinPcap 3.1. No other builds of Vista have been tested. Additionally, the support for this operating system is limited.