Firewall Question
I'm a bit confused. I've been told by my computer-savvy friend,that, since I access the internet a router, with anti-virus software on my system, I don't need a third-party firewall, since Windows' inbuilt Firewall, which I have switched on all the time, will do the job adequately.
However, if this is the case, why would anyone purchase third-party firewall protection? Am I safe?