Shield info https://www.avast.com/en-eu/faq.php?article=AVKB167
You already have a very good firewall in Win 7 … and if you are behind a router/ISP box with firewall, then you have two www.howtogeek.com/172349/why-you-dont-need-an-outbound-firewall-on-your-laptop-or-desktop-pc/
