Avast Internet Security 5.0

Avast Internet Security includes antivirus engine, anti-rootkit protection, anti-spyware protection, script shield, process virtualization, command line scanner, anti-spam filter, and built-in firewall. Avast Internet security includes all the features of the free Avast anti virus
and Firewall, and antispam. Once installed, avast runs silently in the
background to protect your computer against all known forms of malware
with a real time virusprotection. Avast Internet Security also fully integrated antispam filter to detect unwanted email.