Also take note that if your using a router, it too has a hardware firewall built in. So with the combination with the windows firewall, you should be o.k.
Routers have pretty basic ones in them if you're using the stock firmware (3rd party firmware such as DD-WRT is better). I mean an actual hardware firewall that has better firewall capabilities .
Can even make your own if you have a spare computer with multiple network ports:
https://www.pfsense.org/‎