|COMODO is hands down THE free firewall to have. It uses proactive HIPS protection that equals or is better than paid software. COMODO is more of a "security suite" than just a firewall, though. It has a firewall, antivirus, and "Defense+" which is a real-time scanner of everything going on in your PC. |
If you already use antivirus/malware then you might want to NOT install/use COMODOs antivirus and Defense+ settings...
Quick question for you tharrat: how tech savvy are you (how well do you understand PCs and what is the extent of your usage of them)? If your skills using them are rather low than it might be better to use a more user-friendly firewall that doesn't have complex HIPS settings that you need to fine tune like ZoneAlarm Free. Hope this helps.
EDIT: I just wanted to add that Yahoo! and other popular chat programs (windows msger, aol msger, ect.) are HUGE havens for people looking to do something malicious to you. NEVER accept a chat or friend invite from somebody you don't know. Randomly messaging someone online is not how you want to make new friends anyway... If you get random chat messages BLOCK the user right away and/or never reply to them. Also remember to close the chat window and if they keep messaging you despite ignoring them (and you can't block people) then logoff the messager for a couple of minutes and let them move to a new victim. Almost ALL chat programs have a block feature so this shouldn't be a problem.