avast! Free Antivirus represents the simplest free antivirus protection presently accessible on the market. This edition is freed from CHARGE for non-commercial & home use. Its options include:

Anti-spyware constitutional
Web Shield
Anti-rootkit constitutional
Automatic updates
Strong self-defense
Virus Chest
Antivirus kernel
System integration
Simple computer programme
Integrated Virus Cleaner
Resident protection
Support for 64-bit Windows
P2P and IM Shields
Internationalization
Network defend