Free antivirus performance comparison

Download Sophos Free Now. There is no such thing as a truly free antivirus. Most antivirus companies limit the free version of their software to only offer basic protection. Windows Defender is not a bad antivirus — it even ranks a little bit better than some third-party free antiviruses. If you choose an antivirus program from a trustworthy company, then yes. All of the brands on this list here are perfectly safe to use — the only difference between their free and paid versions is that the paid software includes additional features, like a VPN, a password manager, and parental controls, as well as better customer support options.

Avira is my 1 pick for the best free antivirus in If you need a free antivirus, take a look at our list of the best free antiviruses in or just download Avira Free. If you want the best protection for all of your devices, you need to pay for a premium antivirus program like Norton or Bitdefender. While there are literally billions of malware attacks reported annually, trojans and adware are consistently the most common types of malware found on Windows computers.

Trojans look like other files with extensions like. If you decide to uninstall your third-party antivirus, your PC will automatically ask you to reactivate the Windows Defender antivirus.

Professional Reviews. Affiliate Commissions. Reviews Guidelines. Katarina Glamoslija Updated on: January 14, This article contains. Short on time? Download Avira Free Security for Windows here. AhnLab V3 Internet Security 9. Avast Free AntiVirus Avast One Essentials AVG Internet Security Avira Internet Security for Windows 1.

Bitdefender Internet Security BullGuard Internet Security G Data Total Security K7 Computing Total Security Avira Free Security.

Antivirus and much more maybe too much. Bitdefender Antivirus Free. The minimalist antivirus alternative. Kaspersky Security Cloud. From Russia, with a few extras. Sophos Home Free. Manage up to three PCs from the web.

ZDNet Recommends. Toda View now at AVG. Avira Free Security Antivirus and much more maybe too much Avira Free Security includes basic antivirus scanning, as expected, but it also includes a pair of extra modules intended to improve performance and safeguard privacy.

The performance tab of the Avira console includes options for cleaning the registry, View now at Avira. Bitdefender Antivirus Free The minimalist antivirus alternative Bitdefender, a privately held company based in Romania, has a solid reputation for its paid security products.

Bitdefender Ant View now at Bitdefender. Kaspersky Security Cloud From Russia, with a few extras Eugene Kaspersky, who founded Kaspersky Lab, argues that offering free protection to its customers is part of its core mission.

Yes, you will see upsell offers in Kaspersky products including a can't-miss red "Upgrade package" button on the Kaspersky View now at Kaspersky. After 30 days, your installation is downgraded to the free edition and you lose the ran View now at Sophos Home Free. Is the Microsoft Defender Antivirus included with Windows 10 good enough?

Do independent antivirus test results matter? Well, sort of. How much does effective antivirus software cost? And McAfee Total Protection has been around forever because quarter after quarter it creates solid, modern antivirus software that protects your PC. In recent evaluations by AV-Test, it had high scores on both protection and performance. Maybe this antivirus provider is not as well known to consumers because of its focus on enterprise security, Trend Micro antivirus quietly brings its business expertise to the home with its Trend Micro Maximum Security tools.

Trend Micro's software earns high marks from AV-Test -- consistently scoring well for detecting zero-day attacks and widespread viruses and malware. And Trend Micro does a good job of not taxing system resources. Free version? It earns high scores for usability and offers solid virus protection.

The free antivirus version of Sophos Home gives you virus protection for three Windows PCs -- using the company's high-scoring anti-malware tool -- plus a day trial of the company's malware-removal tool.

Test after test, Avast Antivirus for Windows performs well for malware detection with options ranging from Avast free antivirus software to Avast Premium Security. And we've included its antivirus in our list of recommended security app options before. But Avast was in the news for several months for its non-antivirus business, so we looked at the company, specifically reports at the end of that Avast allegedly collected user data with its browser plug-ins and antivirus software and then sold data it collected through its Jumpshot subsidiary in early In response to the reports that his company gathered and sold the details of its customers' online activities, Avast CEO Ondrej Vlcek said in a statement that he understood that his company's actions raised questions of trust in his company.

To address that, Avast terminated Jumpshot data collection in January and closed its operations because the data collection business wasn't in line with Avast's privacy priorities. These newer reports follow another in from Avast that its internal network was breached , possibly to insert malware into its CCleaner software, similar to an earlier CCleaner hack that occurred prior to Avast's acquiring the Windows utility. Avast is now saying the right things about taking its customers' privacy seriously , but it only came to that point after reacting to investigative reporting that revealed the Jumpshot practices.

The CCleaner revelations, while concerning, were self-disclosed, which is important to building user trust. We hope Avast's more privacy-friendly policies mean that there will be no further Jumpshot-style activities and it returns to glory as one of the best antivirus software. In the meantime, we'd recommend using one of the many other solid choices in this realm listed above.

Because the company has been in the news the past few years, let's talk about Kaspersky Lab -- specifically about the federal ban that blocks US government agencies from using Kaspersky Antivirus products. Based in Moscow, Kaspersky Lab has for years produced some of the best antivirus software for business antivirus needs and home customers. But in the US government prohibited Kaspersky security cloud software on federal government computers because of alleged ties between Kaspersky and the Russian government.

But as with China-based Huawei , the question remains: If the federal government doesn't think the products are safe enough for its own devices, should consumers avoid them as well?

In a statement sent to CNET, the company said, "Kaspersky Lab has no ties to any government, and the company has never, nor will ever, engage in cyber offensive activities.

Kaspersky Lab maintains that no public evidence of any wrongdoing has been presented by the US government, and that the US government's actions against Kaspersky Lab were unconstitutional. In Kaspersky's favor, it continues to earn top scores and awards for virus and malware detection and endpoint protection from independent testing labs.

And it's reasonably priced. In the end, even though no one has ever publicly produced a "smoking gun" linking the company to Russian intrigue, we think any of the options listed above are a safer bet. And if you are a US government employee or work with the federal government, you'll want to steer clear of Kaspersky internet security products -- and perhaps use one of the antivirus software products mentioned here instead. Picking the best antivirus software for Windows means finding one that keeps your PC safe, doesn't take up a lot of system resources, is easy to use and stays out of the way till you need it.

Here's what to look for. Antivirus software runs virus scans for known viruses and malware, of course, and can offer real-time protection.

And it watches for shady websites and suspicious links to keep you out of trouble.