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Many of the big names in antivirus offer a free version of their security suites. Here are our top five choices for free AV.

Bitdefender Antivirus Free for Windows delivers set it and forget protection for those looking for a no-frills, free antivirus.

Microsoft Defender is improving, but you still shouldn't rely on it by itself. That doesn’t mean you have to pay extra, though. We’ve tested the top free antivirus apps so you can protect your PC for free.

Kaspersky Security Cloud Free offers full-scale malware protection along with some suite-level features. It gets superb scores from the independent labs, and it won't cost you a penny.

Kaspersky Anti-Virus takes perfect or near-perfect scores from all the independent testing labs, and it aced our hands-on ransomware protection test. It remains an antivirus Editors' Choice.

Bitdefender Antivirus Free for Windows offers the same core antivirus technology found in the commercial Bitdefender Antivirus Plus, focusing on the essential task of antivirus protection with minimal add-ons.

Kaspersky Security Cloud Free combines excellent malware protection, plenty of extra features and a very light system-performance impact.

Ransomware attacks turn important files into encrypted gibberish; paying to get them back is often your only option. Ransomware protection can prevent those attacks from succeeding.

All Specs Everybody needs antivirus protection. Microsoft agrees—if Windows detects no third-party antivirus it insists on enabling its own Windows Defender. But you can get better protection than the built-in without laying out any extra cash. AVG AntiVirus Free has millions of users around the world. In our own tests and tests by the independent labs, it earned excellent scores. AVG vs. Avast In 2016, Avast acquired AVG. Both product lines continue their separate existence, but the underly...