Avast AntiVirus is a popular and best free full version antivirus for Windows. Avast antivirus is completely free license, but there is also a paid version. In addition, avast is in the top 10 best antivirus for PC in 2011.

NortonInternet Security delivers the fastest and lightest online threatprotection available. It guards your PC, network, online activities andyour identity with innovative detection technologies optimised to combattoday saggressive, rapid-fire attacks.

TrojanKiller is designed specifically to disable/remove Malware without theuser having to manually edit system files or the Registry. The programalso removes the additional system modifications some Malware carriesout which are ignored by some standard antivirus scanners.

IObit Malware Fighter is an advanced malware & spyware removal utility that detects, removes the deepest infections, and protects your PC from various of potential spyware, adware, trojans, keyloggers, bots, worms, and hijackers. With the improved, unique "Dual-Core" engine and the heuristic malware detection, IObit Malware Fighter detects the most complex and deepest spyware and malware in a very fast and efficient way.

BitDefender Total Security 2012 provides Internet-connected families with the latest protection against Web-based attacks, faster performance for secure online gaming, and unrivaled parental controls.

ESET NOD32 Antivirus provides reliable, advanced protection against threats endangering your PC. Viruses, worms, Trojans and other trouble now can not do any harm to information valuable to you. Advanced detection methods are used in this program, provides protection even against future potential threats, which are the new worms and viruses. The fourth generation of the NOD32 Antivirus System features a fully integrated software suite characterized by an unprecedented high rates of detection, fastest scanning rates and extremely low utilization of system resources.

AVG Internet Security provides multiple layers of protection for everything you do online, which means you don-t have to worry about identity theft, viruses, or visiting harmful sites.

key till october 2012

Maximum protection for your computer against malware, online threats and misuse of confidential data. The program protects the computer from viruses and spyware at all entry points. All electronic mail and websites are examined in order to detect dangerous or unwanted content. It enables the reliable protection of sensitive data by encryption or the permanent shredding of confidential files no longer in use.

Proactively stops and removes malicious software, extends coverage against new security risks, and reduces the cost of responding to outbreaks. Enterprises cannot afford to wait for every threat to be identified and a signature file to be released. The time between attack and subsequent identification is critical, and the shorter, the better. It is better yet if your protection technology identifies new, unknown threats. By blending advanced anti-virus, firewall, and intrusion prevention technologies, VirusScan Enterprise covers a broad range of threats. With advanced heuristics and generic detection it finds even new, unknown viruses, even hidden in compressed files. McAfee VirusScan Enterprise looks for exploits known to target Microsoft applications and services and will identify and block threats that take advantage of javascript and VisualBasic coding

Emergency Kit Emsisoft Emergency Kit - contains a set of programs that can be used without installing any software to scan and clean infected computers from malicious programs. Emsisoft Emergency Kit - scans the infected computer for viruses, Trojans, spyware, adware, worms, dialers, keyloggers and other malicious programs.

Malwarebytes' Anti-Malware is an anti-malware application that can thoroughly remove even the most advanced malware. It includes a number of features, including a built in protection monitor that blocks malicious processes before they even start.Malwarebytes' Anti-Malware monitors every process and stops malicious processes before they even start. The Realtime Protection Module uses our advanced heuristic scanning technology which monitors your system to keep it safe and secure. In addition, we have implemented a threats center which will allow you to keep up to date with the latest malware threats. Malwarebytes' Anti-Malware is considered to be the next step in the detection and removal of malware. We compiled a number of new technologies that are designed to quickly detect, destroy, and prevent malware. Malwarebytes' Anti-Malware can detect and remove malware that even the most well-known Anti-Virus and Anti-Malware applications on the market today cannot.

Rising PC Doctor, professional and smart security tool to computer users.With its seven key functions of automatic malware analysis, immunization of USB storage devices, ability to repair Microsoft Internet Explorer & Windows, Trojan Behavior Detector & Blocker, protection against malicious websites, Internet Explorer protection and Trojan Download blocker, Rising PC Doctor will greatly enhance your protection against malware and cyber threats.

SUPERAntiSpyware is the most thorough scanner on the market. Our Multi-Dimensional Scanning and Process Interrogation Technology will detect spyware that other products miss! SUPERAntiSpyware will remove ALL the Spyware, NOT just the easy ones! SUPERAntiSpyware features our unique Process Interrogation Technology (PIT) that allows threats to be detected no matter where they are hiding on your system. Many new types of threats utilize "Rootkits" or "Kernel Drivers" to hide themselves to avoid detection by standard anti-spyware applications. SUPERAntiSpyware's Process Interrogation Technology locates even the toughest of threats. SUPERAntiSpyware is a next generation scanning system that goes beyond the typical rules based scanning methods. Our Multi-Dimensional Scanning system detects existing threats as well as threats of the future by analyzing threat characteristics in addition to code patterns.

Rising PC Doctor, professional and smart security tool to computer users. With its seven key functions of automatic malware analysis, immunization of USB storage devices, ability to repair Microsoft Internet Explorer & Windows, Trojan Behavior Detector & Blocker, protection against malicious websites, internet Explorer protection and Trojan Download blocker, Rising PC Doctor will greatly enhance your protection against malware and cyberthreats.

Bitdefender Antivirus Plus 2012 antivirus software with professional features designed for extra security on your computer. Bitdefender Antivirus provides advanced proactive protection against viruses, spyware, phishing attacks and identity theft. The program provides a special kind of quiet protection: no pop-ups, no settings, does not interrupt your activity on the computer.

key till october 2012

Maximum protection for your computer against malware, online threats and misuse of confidential data. The program protects the computer from viruses and spyware at all entry points. All electronic mail and websites are examined in order to detect dangerous or unwanted content. It enables the reliable protection of sensitive data by encryption or the permanent shredding of confidential files no longer in use.

Proactively stops and removes malicious software, extends coverage against new security risks, and reduces the cost of responding to outbreaks. Enterprises cannot afford to wait for every threat to be identified and a signature file to be released. The time between attack and subsequent identification is critical, and the shorter, the better. It is better yet if your protection technology identifies new, unknown threats. By blending advanced anti-virus, firewall, and intrusion prevention technologies, VirusScan Enterprise covers a broad range of threats. With advanced heuristics and generic detection it finds even new, unknown viruses, even hidden in compressed files. McAfee VirusScan Enterprise looks for exploits known to target Microsoft applications and services and will identify and block threats that take advantage of javascript and VisualBasic coding