All the listed Antivirus Software are available for free download, either as Home editions or as complete trial versions, and some can be upgraded to premium versions if required.
SEE ALSO : 9 Best Free Antivirus for your Android Phone
These are the best Antivirus Programs for PC, with Operating Systems like Windows, Linux and Mac OS. So select the one that you like, download it for free, and hence secure your computer from any kind of Security threat.
1. Microsoft Security Essentials
Microsoft Security Essentials is the best Antivirus Software program for Windows Platform. It is the best suited antivirus for Windows XP, Windows 8, Windows 7 and Vista. Exclusively made for Windows OS, this Antivirus Program is light, fast, intelligent, easy to use and the Microsoft team provides excellent online support. It gets updated automatically and the new features are included into it with time. But you must have Genuine Windows otherwise you cannot install this on your system.
2. avast! Free Antivirus
Avast Free Antivirus software with its latest version 7 is second on this list. Avast has become very sound, strong and secure with its new version. Its several outstanding features include,
- Antivirus and Anti-spyware engine.
- Real-time and anti-rootkit protection.
- Boot time scanner and avast! Safezone.
- Auto Sandbox and avast! real time shields like Mail shield, Web Behavior Shield, Network Shield etc.
3. Avira Free Antivirus 2013
Avira AntiVir Personal is a popular and best rated antivirus software by users around the world. Its entry-level version is available for free downloading, and you can also try its paid/premium version for 30 days trial period. It offers great security features such as Anti Phishing, Web Guard Protection, Anti Drive, Mail Guard etc. It is best suited for Internet connected as well as offline Computers.
4. AVG Antivirus Free 2013
It is highly rewarded and rated antivirus software available for free download and is compatible with both Windows and Mac OS. It has powerful features including powerful protection behind the background, it is light for systems. Its full version is available for free download.
5. iAntivirus for Mac
iAntivirus is specially built for Mac OS, but can be used for Windows OS too. It is a popular, strong and secure antivirus for Macbooks. It provides real-time system protection and comprehensive system scanning to ensure your Mac remains safe, secure, healthy and free of all online and offline threats.
6. Panda Cloud Antivirus
Panda Cloud Antivirus is light, secure and gets updated automatically through its cloud service, so you don't have to bother about upgrading it regularly. It keeps providing security to your system without even noticing it. But it has this feature of the automatic quarantine which makes it a little troublesome.
7. Comodo Free Antivirus
Comodo Antivirus has the award winning firewall application and it provides very strong and efficient protection to your PC against all types of online threats including spamming, phishing, viruses, malwares, Trojans and hacking attempts.
8. Bitdefender Total Security 2013
It is a very capable and sound Antivirus when its about online and offline security of Windows and Mac system. It has been around for a long time and has gained trust and faith of a large online user community.It provides Virus Scanning and Removal facility in gaming mode and provides quarantine and scheduled clean up facility.
9. Malwarebytes Anti-Malware Free
It is comparatively a new anti-malware software but is fast gaining popularity amongst user because of its simple yet powerful features and performance. Its mainly more popular for machine level system protection and anti virus features than an online/real time system protection against many types of infection.
10. PC Tools Antivirus
For its excellent features and performance it was awarded "Product of the year" by PCMag.com in the year 2009. This antivirus is combination of two well efficient engines, namely Antivirus (guards against malicious PC threats) and Antispyware (guards against information and identity theft).
