Router - Firewall blocking stuff

Well new computer and everythink anyways ill cut to the story i have a netgear router that connections my computer and my mums laptop to the Internet simple? but when i download stuff U torrent Limewire even install game it always comes up with something like "Your computer seems to be behind a firewall" or "Your computer is slow because you have a firewall on".

So i turn off Windows firewall and yet i still get this same god dam message people tell me to go onto the expections tab on firewall and when i do i add programmes give them a tick but yet i still have this firewall on which leads me to the router has a firewall so how do i take this firewall down altogether? or is it easy just to add the programmes i want?

Yeah, it should have a web interface. Usually default IP is 192.168.0.1....192.168.1.1.....