Installed Outpost Pro v6. Having tried (again) many many firewalls on win7, the pickings are much much slimmer than on XP. Many would not work, some would not install, even in compatability modes. I don't use a firewall but for one reason - to show me what is going on when I want to test something. For myself, none of the other firewalls UI is as enjoyable to work with as Outpost nor as concise. I wish there were another alternative, such as WFW, but sadly there is not. Sul.