Totally Free Anti-Virus Software
Microsoft Security Essentials
There are a host of nasty intruders on the Internet including viruses, trojans, worms and spyware. Award-winning protection against intruders without getting in your way. Downloading and installing is free* and easy. The software updates automatically once a day. You don't have to do anything and runs quietly in the background. You'll only be alerted when there are specific actions to take. When you're away or busy, Microsoft Security Essentials can take the default action on your behalf and you can open the program later to review and undo those actions if you wish. Efficient and compact. Scans and updates are scheduled to run when the PC is idle and the software works in a way that your PC is still snappy when you're using it. 11.1 MB+ download.
*Your computer must run genuine Windows to install Microsoft Security Essentials.
Avast! Antivirus Free Edition
A full-featured antivirus package providing continuous protection of your valuable data and programs by updating itself automatically. Simply install and forget. It also comes with anti-spyware & anti-rootkit protection for Windows, which are typically available only in the paid versions of many antivirus products. It is now free of charge for HOME users for NONCOMMERCIAL use. Detection of In-the-Wild viruses and very good detection of trojan horses, all that with only a minimum number of false alarms. Includes the Virus Cleaner, a tool designed for a complete removal of most common infections from already-infected computers. Online FAQ pages and forum support. 151 MB download.
AVG Anti-Virus Free Edition 2016
Anti-virus protection that automatically updates to protect you from continually evolving threats. As hackers develop new techniques, AVG's research labs are constantly processing web data to provide new defenses to keep you automatically protected. Our Anti-Virus technology protects you from falling victim to (or unwittingly spreading) a virus, worm, or Trojan horse. The first layer of protection is traditional anti-virus, which keeps known threats out of your system by matching them to a database. AVG Anti-Spyware protects you from Spyware and Adware that can keep track of your personal information. AVG Resident Shield provides an additional layer of protection by examining files for threats as they are being copied opened or saved and prevents you opening infected files. Free support is available from other AVG users in our dedicated forum at forums.avg.com/avg-free-forum. AVG Anti-Virus Free Edition may only be used on one computer for personal use. 209 MB+ download.
Avira Free Antivirus
A reliable free antivirus solution, that constantly and rapidly scans your computer for malicious programs such as viruses, Trojans, backdoor programs, hoaxes, worms, dialers etc. Monitors every action executed by the user or the operating system and reacts promptly when a malicious program is detected. Avira Free is a comprehensive, easy to use antivirus program, designed to offer reliable free of charge virus protection to home-users, for personal use only, not for business or commercial use. Available for Windows or UNIX. 159 MB download.
BitDefender Antivirus Free Edition
Features on demand virus scanning and removal. Powerful scan engines ensure detection and removal of all viruses in the wild every time you need it. The Scheduler lets you plan ahead, and schedule full system/drive scans in the off hours, when you won’t be using your computer. Immediate scanning allows you to check your files and folders with just a right click. By isolating the infected files in quarantine, the risk of getting infected diminishes. You also have the possibility to send these files for further analysis to BitDefender Labs. When launching a scan you may choose to create a report file where you can see statistics about the scan process. BitDefender Free Edition is an on-demand virus scanner, which is best used in a system recovery or forensics role. If you are on an "always-on" Internet connection, we strongly advise you to consider using a more complex antivirus solution. 159 MB download.
Dozens of antivirus programs exist, with varying prices and different levels of effectiveness. Only this AntiVirus download however, offers total PC protection for free. It's not some stripped down version of a paid product: it's the real deal. Scan any drive or file. Get in-depth reports on viral activity. Detect suspicious files that behave like computer viruses do. Even scan compressed .zip files, where viruses often hide. All in one attractive user-friendly interface. Unique AntiVirus Features: Proactive "intelligent" protection intercepts unknown threats. Automatic updates for the most current virus protection. Easy to use interface lets you install and forget: no annoying pop-ups or false alarms. Isolation of all suspicious files eliminates the chance of PC contamination. Defense + technology constantly protects you. 208 MB download.