Antivirus software are a crucial part of computers. Numerous free antivirus software exist for computers – indeed after AVG’s launch and success in the free antivirus software market, numerous antivirus software companies have released their own free versions. Even Microsoft has an antivirus that is purportedly stable and works well – scoring good results in antivirus tests.
Here is a list of 8 of the best and most popular Antivirus out their:
AVG Anti-Virus Free Edition
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The earliest, simplest and most popular free antivirus out their, AVG is an excellent piece of security software that is akin to the more commercial and proprietary software. It is used by millions of people all over the world.
Avast Free Antivirus
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A sleeker and later entry into the free antivirus market, Avast has its own well established premium antivirus software with commercial, enterprise solutions. Despite this, its free offering is above par.
Avira AntiVir Personal – Free Antivirus
Get Avira AntiVir Personal – Free Antivirus software
An entry that came into the antivirus market after AVG, Avira is more kin to AVG than to other Antivirus software. It has excellent updates and through scans of the computer.
Microsoft Security Essentials
Get Microsoft Security Essentials Antivirus software
From the company itself, Microsoft Security Essentials is, surprisingly, free. It is available for Windows XP, Vista and 7 users. However, it requires Windows Genuine copy for installation. It is also an excellent software and would be recommended for Windows users.
ThreatFire AntiVirus Free Edition
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This Antivirus is unique in that it helps a person protect againt buffer overflows and rootkits – as opposed to AVG which requires a separate rootkit scanner and remover.
Panda Cloud Antivirus Free Edition
Get Panda Cloud Antivirus Free Edition Antivirus software
From the makers of the Panda Security software, this antivirus software helps protect your PC against viruses, spyware, rootkits, and trojans.
ClamWin Antivirus
Get ClamWin Antivirus software
The only open source antivirus software on this list, ClamWin is a stable antivirus that is supported by numerous developers all over the world – with code being developed via an open source community to ensure that the security is top notch.

{ 2 comments… read them below or add one }
I have used Panda Cloud Antivirus and it does a good job. I also have found Norton Antivirus to be quite reasonable too.
Microsoft Security Essentials works well with vista.