Be Secure…
You could always try the “best” free firewall…

http://tinyurl.com/o3q3tu3

The Comodo free firewall link is soooooo long, I had to use the “tinyURL” site to shorten it. :wink:
Been using Comodo for years & never had a problem with either it or getting anything nasty on my M/C.
It does exactly what a good firewall should.

Stay safe.