avast! Home Edition is a complete anti-virus package, that is is free for registered home non-commercial users. It contains an on-demand scanner with two interfaces (simple for novices and advanced for experienced users), an on-access scanner with Standard Shield (which protects against execution and opening malware programs) and an embedded e-mail scanner which scans incoming and outgoing email messages. avast! Home integrates with the Windows Explorer right click menu and also includes a special screen saver which is able to scan your system while your computer is not in use. Updates are incremental and frequently made available for manual or scheduled download. You will download a 60 days demo, if you would like to continue free usage beyond that time, you`ll need to register from the home page to obtain a free activation key by email.