There is no better way of comparing free Anti-virus/Anti-spyware programs other than personal experience. And when it comes to the experience of a person who regularly installs unpopular and fairly unreliable software from the internet, and he who occasionally browse virus and spyware infested “pron”, mp3 download, and software hacking sites, I personally recommend, either or all, Antivir, AVG, and Norton Security and Spyware Doctor.
Though Norton Security and Spyware Doctor, and AVG are a popular one since these are commonly recommended free antivirus by many personal computer users, based on my personal experience, Antivir is the best.
1. Its hard to trust unpopular antivirus because it might be a virus itself without us knowing. Well, I took this risk when I started using this software. And the reward is good. To compare these four, I did installed all of these antivirus programs and try to make a separate scan whenever I encounter virus/spyware infection; and most of the time its Antivir who made the catch.
2. Unlike AVG, Norton, and Spyware doctor, Antivir consumes only a little bit of memory of your program so it does not slow down your processes.
3. The software never expires, unlike AVG.
If you want a good security for your computer, have a try on this one.