i find tinywall to work fine and dose not slow my system down or give any of the programs any problems to use. you do have to configure tinywall to the way you want to use it and the good thing is its only a few click of a button.
i also use qihoo 360 total security and my step father uses the mac version he found it easy and he knows nothng about computer
www.360safe.com i also use baidu antivirs along side of it and still dont findmy system to slow down with the test i have done on my pc. there is another firewall you could look at glasswire
www.glasswire.com. Let me know what you guys think of glasswire please.
remember one thing choose the firewall and antivirus that works for you do your reseacher first and test to make sure the firewall and antiviruse is work and is working for you and your system i choose to use 360safe because it have 5 antivirus engines in it one being bitdefender and avira. also be safe on the net never go to sites you dont know and vpn is another way to be safe on the net.