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Top 5 Antivirus Software for Your Windows PC

Every Windows PC, laptop or tablet needs security software. And that should include an up-to-date firewall, antivirus and antispyware. That doesn’t automatically make your PC secure, of course. Human behaviour is such that an online PC or laptop is never entirely safe – but solid security software is a good start, and it will protect you from all but the most sophisticated and well directed attacks.

Times are hard and not everyone wants to shell out $60 or $70 a year for the top-rated security products. The best performing internet security products from the likes of Norton and BitDefender offer best-in-class antivirus engines. But their principle benefit is additional features that help you secure data and make informed decisions about potential threats. You can get by with free alternatives. There is an additional risk, but a major cost saving. Here then is our list of the best free antivirus software. Let’s check it out.

Microsoft: Windows Defender

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We’re not taking these in any order, but we have to start with Microsoft’s own AV product. If you buy a computer running Windows 8 it comes with Windows Defender installed. Windows Defender in Windows 7, Vista and XP is a slightly different thing, but if you install the free Microsoft Security Essentials it adds the same level of protection. As an integral part of Windows it is easy to use.

So if Microsoft makes its own free Windows antivirus, why would you ever pay for security software?

Well, it’s fair to say that the protection isn’t the best on the market, although it is far from terrible. In AV-Test.org’s most recent tests Windows Defender picked up 99 percent of known threats, and in January 2013 it found 98 percent as against an industry average of 99 percent. More important are unknown or so-called ‘zero-day’ threats. Here Windows Defender 4.0 picked up only 82 percent of threats in January 2013, and dropped to 81 percent in February.

Avast Free Antivirus

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Let’s go alphabetical and start our look at third-party programs with Avast’s Free Antivirus. Here the story is much more positive. Avast matches Windows Defender’s decent performance result, and also fails to give any false positives. So far so solid.

But Avast offers much better protection than Windows Defender. Indeed, it offers great protection.

In tests Avast’s Free Antivirus found 99 percent of all know threats, which is the industry average (including paid-for security products). More important is the way Avast deals with zero-day threats. In January it picked up 98 percent of unknown security threats, and in February 2013 100 percent, as opposed to an industry average of 95 percent. Kudos to Avast, to which AV-Test awards 5.5/6 for protection. That’s good enough for us.

AVG Anti-Virus Free Edition

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AVG is almost up there with Avast in terms of the all-important protection. In both January and February 2013 it detected 99 percent of the known threats thrown at it by AV-Test.org. That is the industry average. Critically, it picked up 98 percent and then 100 percent of unknown threats. Avast is just on top there, but AVG Anti-virus Free Edition’s protection performance is excellent. AV-Test awards 5.5/6 for protection.

System performance better than that of Avast, however. AV-Test offers a decent score of 4.5/6, so if you have an underpowered PC this may be a good choice for you, given the protection score.

Finally, in terms of false positives AVG kicked up a handful over the two tests in January and February 2013, but nothing that would cause any concern.

Check Point ZoneAlarm Free Antivirus + Firewall

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Check Point’s ZoneAlarm Free Antivirus + Firewall antivirus program is another of the big beasts of the free security world. System performance is good once again, and AV-Test offers a performance score of 4.5/6. Even more impressive is the usability score – only Windows Defender has fewer false positives on test than does ZoneAlarm Free. So ZoneAlarm won’t slow down your PC or spam you with false positives.

But will it help to keep your PC safe? It will – perhaps not as well as AVG and definitely not as well as Avast, but ZoneAlarm offers good protection.

In AV-Test.org’s January- and February 2013 tests ZoneAlarm found 99- and 100 percent of all known threats. Alas when dealing with zero-day threats it dug out only 91- and 93 percent of attacks. This is not terrible, but the industry average is 95 percent and AVG and Avast are both much better.

Good then, but not great. ZoneAlarm Free AntiVirus + Firewall is worth a look if you have a low-powered PC, but the protection offered elsewhere is better.

Panda Security Cloud Antivirus FREE

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One other free security program worth your consideration is Panda’s Cloud Antivirus FREE. It’s a good all rounder offering solid protection. In the January- and February 2013 tests it dealt with 100 percent of the known threats AV-Test pushed in its direction. It wasn’t quite so good at dealing with zero-day threats, although it outperforms Windows Defender and ZoneAlarm, picking up 95 and 94 percent of threats over the two months. That’s just about industry average.

Add to this an excellent usability score in which Panda failed to produce any false positives, and a decent performance score of 4/6 and you can see that Panda is a good free antivirus.

These are our list of antivirus software for Windows PC, what about yours? Just share yours on our site. You may also check more posts on our site for more software for Mac or Windows PC.

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