Only the top rated free antivirus of 2011 are listed below, tested and recommended by TVL. Feel free to comment below if you think this page needs additions or edits.
Ad-Aware Free Internet Security
Features include real-time protection, advanced Genocode detection technology, rootkit protection, automatic updates, and much more — to ensure that you have the power to protect yourself online.
Avast Home Edition
Avast includes the following components: On demand scanner with skinnable simple interface, just select what you want to scan and in which way and press the Play button; On access scanner, special providers to protect the most of available e-mail clients; Instant messaging–ICQ, Miranda; Network traffic–intrusion detection, lightweight firewall; P2P protection for Kazaa, BitTorrent; Web shield–monitors and filter all HTTP traffic; NNTP scanner–scans all Usenet Newsgroup traffic and all operations with files on PC; Boot time scanner–scans disks in the same way and in the same time as Windows CHKDSK does.
AVG Anti-Virus Free
AVG Free is available free of charge to home users for the life of the product. Rapid virus database updates are available for the lifetime of the product, thereby providing the high level of detection capability that millions of users around the world trust to protect their computers. AVG Free is easy to use and will not slow your system down. Highlights include automatic update functionality, AVG Resident Shield, which provides real-time protection as files are opened and programs run, free Virus Database Updates for the lifetime of the product, and AVG Virus Vault for safe handling of infected files.
Avira AntiVir Personal
Avira AntiVir Personal Edition Classic is a comprehensive, easy to use antivirus program, designed to offer reliable free of charge virus protection to home-users only. Avira offers; Extensive Malware Recognition of viruses. Automatic incremental updates of antivirus signatures, engine and entire software. Permanent virus protection, with Virus Guard real time monitoring. Install and configuration in just a couple of steps, setup to protect your PC in minutes. Virus protection against known and unknown threats, using an advanced heuristic system. Scheduler to make automatic virus scans or updates on your system. Forum and phone support. Knowledge Base with virus descriptions available on web site. Vista Support. Rootkit Detection and Removal.
ClamWin Free Antivirus
ClamWin Antivirus is antivirus software for Windows. It provides a graphical user interface to the Clam AntiVirus engine. ClamWin Antivirus comes with an installer and open source code at no cost. It features: scanning scheduler, automatic virus database updates, atandalone virus scanner, integration to MS Windows Explorer, and add-in to MS Outlook.
Antivirus also includes a mechanism for you, the user, to submit any files you find suspicious to the Safe List. Get immediate feedback on possibly viral files: have any other users submitted it? Or has it already been declared PC-friendly and landed on the Safe List? Instant feedback, from our security experts and other PC-users.
Malwarebytes Anti-Malware Free
Malwarebytes Anti-Malware Free utilizes Malwarebytes powerful technology to detect and remove all traces of malware including worms, trojans, rootkits, rogues, dialers, spyware and more.
Microsoft Security Essentials
Microsoft Security Essentials is a free* download from Microsoft that is simple to install, easy to use, and always kept up-to-date so you can be assured your PC is protected by the latest technology. It runs quietly and efficiently in the background so you’re free to use your Windows-based PC the way you want—without interruptions or long computer wait times.
Panda Cloud Antivirus
Don’t worry about complicated decisions ever again. Panda Cloud Antivirus will make the best decisions for you to keep your PC protected. Only works where necessary. It’s so light you won’t even notice it.
PC Tools AntiVirus Free
PC Tools AntiVirus Free Edition protects you against the most nefarious cyber-threats attempting to gain access to your PC and personal details. Once infected, the virus will usually attempt to spread itself to your friends, family and associates by accessing your e-mail contacts and networked PCs. That’s why PC Tools AntiVirus Free Edition provides protection, with rapid database updates, OnGuard real-time file, Internet & e-mail protection and comprehensive system scanning to ensure your system remains safe and virus free.
ThreatFire AntiVirus Free
ThreatFire is unlike traditional antivirus products that rely on old fashioned “signature” technology and require updating every time a new threat occurs. ThreatFire’s patent-pending ActiveDefense technology provides powerful protection against zero-day and emerging threats, constantly monitoring both known and unknown viruses, worms, trojans, rootkits, buffer overflows, spyware, adware and other malware. ThreatFire is the perfect complement to traditional antivirus programs.