At the end of the day, most antivirus will be the same. They'll all offer you decent protection and detection, and you'll find out you can choose the one that fits you the nest. Most of the times, you will find this great security software you love. It includes awsome modules and it makes you feel protected. Still, you're not sure, because if has no firewall. Combine, my friend. Software combination will make you achieve great stuff. Grab your Avast Free and install COMODO's Free Firewall. Tweak. Maybe disable COMODO's HIPS and install VoodooShield. See what i did there? I covered almost all weak points on my PC by installing software and tweaking it to achieve best results. Do this. Research and how to do this. You won't be 100% protected ever, but you can try your best. Almost always, it won't be enough with buying Kaspersky Internet Security and installing it by default. Combine, tweak, research, ask, learn. It's your system and you know exactly how you want it.