>What do you need to do that is beyond the built-in Windows firewall? My experience is additional firewalls/anti-virus isn't needed on Windows 7 and higher.

That is for an usage at a corporate level. Yes, Windows Firewall was also recommended by a network specialist today as to know why it wouldn't be used. I was not involved in that. But, I was curious to know if it is legit and if it does at least what Windows Firewall is doing.