If you need free protection for your computer, Avast is the way to go. Avast home edition has the best anti-virus protection available and is free.
Avast is designed to protect your data and programs from many threats. It keeps itself up-to-date so you don't have to worry about any updating yourself. Avast comes with anti-spyware, anti-rootkit, and strong self-protection which many other vendors charge for.
Click HERE for more information and to download it.