Few prefer to install free Antivirus Software were few want paid protector to protect system. Therefore, according to Microsoft here are the best free antivirus list.
Few free antivirus:
AVG - AVG Free provides the bare necessities when it comes to security, but that should be enough for savvy Windows users. You’ll get a combined antivirus and antimalware engine, LinkScanner, and e-mail scanning. AVG Free 9 introduces a few new features, with improvements focused on performance, including claims of faster scan and boot times. One new feature is the Identity Theft Recovery Unit. Only for users in the United States, ITRU is a business partnership with Identity Guard which provides “consumer identity theft solutions,” accessible only from the AVG toolbar in Firefox and Internet Explorer.
Link to Download AVG – Click Here (File size – 2.03MB)
AVAST – After Avast 4.8 now they have launched Avast Free 5, best quality antivirus and a speed up scan with a well know company. Avast is remarkable for both its effectiveness and arguably providing the most complete free antivirus on the market. (My personal experience with them is awesome, I’m using for last 2 years)
Link to Download AVAST – Click Here (File size – 51.29MB)
AVIRA - Avira’s AntiVir has been a player in the security world for some time; however, in 2008 its status boomed because of its remarkably strong detection rates. It still remains near the top of independent antivirus efficacy tests, but while the 2009 version more or less kept pace with the competition, the 2010 edition isn’t quite as good as it could be.
Link to Download AVIRA - Click Here (File size – 42.05MB)
Bitdefender - Confidently download, share and open files from friends, family, co-workers – and even total strangers. Protects against viruses and other malware using industry-leading technology. Scans all Web, e-mail and instant messaging traffic in real-time. Provides an unmatched detection rate of new threats based on two different proactive technologies. Blocks spyware programs that track your online activities. Protect your identity: shop, bank, listen and watch, privately and securely. Blocks web pages that attempt to steal your credit card data. Prevents personal information from leaking via e-mail, Web or instant messaging. Guard your conversations with top-of-the line encryption.
Link to Download Bitdefender - Click Here (File size – 154.8K)
Few paid antivirus but with TRAIL 30Days:
Trend Micro – If you’re looking for a robust feature set from your security suite, and you want an affordable price, you could do worse than Trend Micro’s 2010 products. Trend Micro Internet Security Pro, Trend Micro Internet Security, and the stripped-down Trend Micro AntiVirus plus AntiSpyware have been refreshed, with the publisher claiming significant performance enhancements to each.
Link to Download Trend Micro – Click Here (File size – 88.38MB)
Norton - Norton Antivirus 2009 is available as a full-function download, free for 15 days. The Download Now link will direct you to the developer’s site where you’ll be asked to provide your e-mail address to download a file.
Link to Download Norton – Click Here (File size – 21.74K)
Nod32 - As far as reputations go, ESET’s NOD32 is practically unimpeachable. Version 4 of the popular and effective antivirus and antispyware builds on that rep, emphasizing its community-sourced ThreatSense for preventing attacks before they occur, a slick interface, and some of the highest independently-tested detection rates married to low rates of false positives.
Link to Download Nod32 - Click Here (File size – 37.51MB)
Kaspersky - Kaspersky Anti-Virus does a better-than-average job of keeping your PC safe, but it lacks the robust feature set of its more-expensive sibling. Several new features have made it into this version along with expected upgrades to the anti-virus engine, but one of the best–the Safe Run program sandbox–is sorely missed.
Link to Download Kaspersky – Click Here (File size – 66.44MB)
ThreatFire - ThreatFire offers real-time prevention of virus and malware infections by identifying suspicious behavior (“zero-day” events) as it happens, before malicious code installs itself on your PC. Formerly known as CyberHawk, ThreatFire has made some dramatic and noticeable feature improvements since it was bought by PC Tools.
Link to Download ThreatFire – Click Here (File size – 8.6MB)
You don’t have to worry for any type of viruses in your PC if one of these antivirus is with you, choice is yours which one you’ll select to fight from viruses in your PC.