Downloaad Avast Free Antivirus

You don't have to spend long with Avast Free Antivirus to realise why it's one of the most popular security tools around.
These aren't just subjective opinions, either. Independent testing by AV-Test has found the program to be a good all-rounder, and it was one of AV-Comparative's "Products of 2012".
Avast Free has some useful extras, too. .

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A Software Updater alerts you to program updates you've missed, for instance, while its Browser Cleanup tool provides a simple way to remove unwanted add-ons from your browsers.

Download Panda Cloud Antivirus Free

Download Panda Cloud Antivirus FreeSmall and simple, Panda Cloud Antivirus is a lightweight tool which provides free real-time antivirus protection, and can be used alongside many other security tools without problems.
It's the free version of a commercial product, and so has a few missing features.

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The core antivirus protection remains the same, though. And while that doesn't deliver the top detection rates, independent testing shows it's very capable, with the program winning certification in AV-Test's latest report.

Download ZoneAlarm Free Antivirus + Firewall

Download ZoneAlarm Free Antivirus + FirewallWe have one or two concerns about ZoneAlarm Free Antivirus + Firewall, notably that its antivirus database is only updated daily (hourly updates are reserved for the commercial version), which leaves you more exposed to the very latest threats,

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It does its best to keep things simple. Open the Preferences dialog, say, and you'll find only 10 buttons and settings (and most of those you'll never need to use).

Download Avira Free Antivirus

Download Avira Free AntivirusAvira Free Antivirus provides two main areas of protection.
A strong antivirus engine (rated highly by independent labs for its file detection rates) constantly monitors your PC, looking for and eliminating threats.

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If you choose to install the Avira toolbar then you also get some web tools (an antiphishing tool, ad blocker, social networking protection), although this also replaces your default search engine with an Avira page.
Problems? The interface can seem a little complex, just at first. And the program has more impact on your PC's performance than some other tools.

Download Bitdefender Antivirus Free Edition

Download Bitdefender Antivirus Free EditionBitdefender's antivirus engine is one of the best around, and a favourite of the independent testing labs, so getting a free version sounds very appealing indeed.
The program is ultra-compact, downloading and installing in less than a minute on our test PC (although it does demand removal of any incompatible products first).

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There are very few manual controls here: no settings, no options, no scan types, no scheduling, nothing at all, perhaps an issue if you like to fine tune your security.

Download AVG Free Antivirus

Download AVG Free AntivirusAVG Free Antivirus is a solid package with a good range of features: an antivirus engine, email scanner, identity theft protection, and LinkScanner Surf-Shield to keep you safe online.
At first glance this makes the program seem more complex, as there are lots of tiles, buttons and menu entries.

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AVG Free Antivirus gets mixed reviews on its effectiveness: AV-Comparatives rate it as average, AV-Test say it's better than some commercial suites. Our view: it's a capable, feature-packed tool, and one of the stronger free antivirus packages.

Download Emsisoft Emergency Kit

Download Emsisoft Emergency KitNo antivirus program comes with a guaranteed 100% detection rate, and malware might occasionally slip through your defences. You should always have a second tool available, then, just in case - and Emsisoft Emergency Kit (EEK) is a great choice.

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Its straightforward system scanner uses a dual-scan-engine, rated highly by Virus Bulletin (and which did actually achieve a 100% detection rate in a recent AV-Comparatives test).
And experienced users will appreciate tools like HiJackFree and BlitzBlank, which can help you manually detect and clean up malware.

Download FortiNet FortiClient

Download FortiNet FortiClientWhile they're best known in the corporate world of network security appliances, FortiNet also produce a capable antivirus tool, FortiClient, which is free for home users.
The program can be installed in two modes. The standard option provides a good range of tools: an antivirus engine, simple parental controls, an application firewall, vulnerability scanning and more. But you can also run FortiClient without its real-time protection, perfect if you need to run it alongside an existing antivirus tool without conflicts.
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Our tests suggest it's not the best antivirus engine around, but is still worth having. AV-Test and AV-Comparatives confirm that it's a good mid-range contender, and FortiClient could be particularly helpful if you want a second-line tool to run alongside an existing antivirus engine.

Download 360 Internet Security 2013

Download 360 Internet Security 2013
Despite its name, this isn't a full internet security suite - there's no spam filter, firewall or parental controls - but installing the program does get you no less than three antivirus engines: BitDefender, its own QVM II, and Cloud 360.

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These delivered accurate results for us, and the independent testing labs have also reported positive results for Qihoo products in the past year (AV Comparatives has certified it as "Windows 8 approved", for instance).