SpywareBlaster is a free program that will help keep your system secure, without interfering with the “good side” of the web. It doen’t running on the background and will works alongside the programs you have to help secure your system.

FREE Comodo Firewall Pro — secure your PCs against internal attacks , such as Trojan viruses / malicious software and external attacks by hackers. It can help you to safe your personal data via a simple user friendly single click interface when you connect to the internet and other network.