avast! 4 Home Edition Anti-Virus Software

avast! 4 Home Edition is a complete antivirus solution, fully able to find computer viruses, to create and check the integrity of programs installed, to test executed programs and opened documents, to test and check email and other functions.
It's a simple download and registration process. During the registration you'll receive an email confirmation with a license key. The license key allows you to receive the non-restricted version of the software. And... it's all free.
This program gives you constant protection while on the Internet, scans your mail programs, isolates viruses, and automatically updates.