I’m behind the curve on this as QuickTime 7.2 for Windows was released July 11, 2007 and there’s already been a security update for it. Apple added support for Windows Vista but dropped it for Windows 2000 (the latest version for Win 2K is 7.1.6 – available here and the security update for it is here).

This is the first time I’ve seen a major software publisher drop support for a version of Windows that Microsoft was still supporting. The Apple download centre for earlier software versions is here.