For Microsoft Windows, dozens of programs are actively being developed that provide functions to protect your computer from viruses, worms, Trojans and other malicious programs.
Consider the five most popular free alternatives to paid packages that provide sufficient security.
Comodo AntiVirus. One of the best free full-featuredAntiviruses with closed source code. Has the functions of proactive protection, heuristic analysis, scheduler. A distinctive feature is the possibility of running suspicious programs in the so-called "sandbox" - an isolated workspace to prevent infection. Supports versions of Windows Xp, 7, 8. It is actively developed. The size of the installer is approximately 88 MB.
Avast!. Another popular antivirus program,Free of charge distributed by the Czechoslovak company. There are about 200 million users worldwide. Has all the modern features of protection against malicious programs. Characterized by a user-friendly interface in Russian, good speed and low requirements for computer performance. He has several awards. The size of the installer is approximately 4.5 MB.
Avira Free Antivirus. The antivirus program being developedThe German company. Has a built-in resident monitor, scanner, automatic update, detection functions of advertising messages, spyware, etc. Characterized by the simplicity of the interface. Supports Windows XP (SP2, SP3), 7, 8. It has awards. The installation file of the program has a size of about 125 MB.
AVG Antivirus Free. Czech anti-virus system. It contains resident file scanners, e-mail, surf protection (checking links before clicking), preventing espionage and stealing data. Certified by all major certification organizations. There are more than 137 million users worldwide. Supports Windows Xp, 2003, Vista, 2008, 7, 8. The installation file is about 136 MB in size.
NANO Anti-Virus. Developed in 2009 by the Russian company. Provides a full range of protection against all types of malicious and dangerous software. It is characterized by the possibility of an independent configuration of program modules, an understandable interface in Russian, minimal load on the system. Is actively developing. The size of the installer is about 500 MB.