I'd like a tool that can live in the system notification area which when clicked toggles suspending/resuming network activity.

As you know, the installers for many programs do all sorts of things behind the scenes, including phoning home and possibly more nefarious things. What I want is a quick way to suspend network activity prior to initiating an install, and then resuming activity on completion.

I'm aware that some firewalls have or had options to do this, but I mainly only use the Windows' firewall.

I'd need this for Win XP and Win 7 machines.

My trawl of the Internet didn't turn up anything, but perhaps some of you know of such a tool? Or can create one?