No one firewall is best for everyone. If one were developed all the other companies would have to file for chapter 11. Look at the various features and find the one you like using and use it. I like ZoneAlarm Pro 3.5. I paid for it and it works well. It blocks adds, Blocks cookies, has email protection, and seems to block all unwanted messages. But there are two more packages you should have 1) a virus scanner 2) a package to find and destroy spyware, trojans, Rats etc. I use Norton Anti Virus at home and Macafee at work. I use PestPatrol at home and work. The three packages seem to work well together. Each is a specialist in its area and helps you maintain your environment.