Comodo Internet Security is Comodo's free antivirus suite. It packs an antivirus scanner and firewall, which are standard for AV suites, but also unique tools like an integrated sandbox environment and a desktop widget.
Virtualized sandbox: Not many antivirus scanners come with a sandbox environment for running unknown programs and Web sites, but Comodo Internet Security goes the extra mile by providing a virtualized environment that looks like Chrome OS. From the virtualized box, you can browse the Web using Comodo's own Dragon browser and not worry about programs making permanent changes to your system. Certain features like Adobe Flash are disabled by default, even when running browsers like Chrome.
Scanning and processing: Comodo Internet Security displays flagged items as a hierarchical tree, whereas other antivirus apps show results in a line-by-line list. This organization makes it easier to act on known apps that are flagged as potentially unwanted programs. For each detected threat, you can clean, ignore the warning, or label false alerts for stub installers and known programs that fall in the potentially unwanted category.
Malware detection: AV-Test rated Comodo Internet Security at 5.5/6.0. The scores put Comodo Internet Security in the upper 90th percentiles compared to the industry average for malware detection in a four-week test period.
Aggressive notification: Upon first use, Comodo Internet Security bugs you about...pretty much everything. We were pegged with countless pop-up prompts from minimizing windows and detected networks, to pushing GeekBuddy (Comodo's tech-help hotline) services post-scan. It was so overwhelming that we felt more stressed than educated.
Potentially unwanted flags: Comodo Internet Security is eager to categorize apps and installers as potentially unwanted programs. A couple of our own files were considered unknown and flagged as risks. Comodo Internet Security leans toward "better safe than sorry," but some alerts felt highly unwarranted.
Comodo Internet Security offers solid protection and some pretty useful features, thanks to its integrated virtualization approach to running apps and browsing the Web. Though the pop-up explanations and slightly aggressive flags are annoying, we still recommend Comodo Internet Security as a terrific free antivirus program.