If you are looking for an effective, lightweight, and FREE anti-virus solution for your home PC, then Avast! is for you. I have extensively used the other free anti virus programs including AVG, Avira, Clam, and my top recommendation is Avast! Benefits: * Frequent automatic virus definition updates * Updates are unobtrusive * Low memory footprint * Option for scan on reboot * 14-month license key Complaints: The only complaint I have with Avast! is that you are required to register your software in order to get your 14 month license key. This step only takes a few minutes, and your license key is emailed immediately, but I wish the installation would automatically generate a serial number like AVG does. Overall, Avast! is an excellent solution for any home user needing a free anti-virus package. Download Avast! Home Edition More Information