Comcast, the nation’s largest ISP, recently made the latest version of Norton Security Suite available for its broadband subscribers at no additional cost.

Norton Security Suite Version 6 is now available through Comcast’s Constant Guard Protection Suite. Comcast’s Constant Guard program was first trialed in Denver in 2009. At the time, it included a bot detection and notification service before Comcast added other online protection features such as identity theft protection.

According to a blog post today by Comcast’s Jim Janco, director of security and privacy, the newest version offers improved features that further protect a subscriber’s identity, detect and eliminate viruses, and stop online threats.

The Norton protection system includes four layers of protection that were designed to proactively stop online threats before they can infect a computer:

  • Network-based protection stops malware as it travels over the network.
  • File-based protection looks for and eradicates many types of malware that could be hidden in files.
  • Reputation-based protection uses data that Symantec has collected from its Norton Community Watch program, and cloud-based technologies such as Norton Insight and Norton Safe Web, to quickly identify known or unknown threats.
  • Behavior-based protection, known as SONAR, inspects computer programs. The program's actions are monitored for malicious behaviors, and if SONAR believes a program is malicious, it can stop the process and have the Norton product take action on the harmful file.

Constant Guard also has PC tune-up, which frees up memory and removes unnecessary clutter from a computer's hard drive to help it run faster and trouble-free.