What does your Windows firewall do?
Sadly, the Windows firewall does very little, if anything, to
help protect your computer.
Of the 25 recognized firewall tests - Windows firewall passed
none.
Think of a firewall as having a security guard on every door and
window of your home. That security guard only lets the people you
allow to enter or leave.
It is a good idea to have a firewall, just it is not a good idea
to depend on the windows firewall, there are much better free ones
available on the Internet.