If you don’t protect your PCs with antivirus, you’re taking some serious risks. A banking Trojan might drain the money from your accounts. A botnet could enlist your PC as part of a zombie army performing mass attacks on corporate websites. You might find your critical documents held for ransom. Counter to all these possibilities is the certainty that you have to pay for protection. Or do you? In fact, there are quite a few antivirus choices that don’t cost a thing. We’ve rounded up the best of these for your consideration.
Your antivirus should certainly have the ability to root out existing malware, but its ongoing task is to prevent ransomware, botnets, Trojans, and other malicious programs from getting a foothold. All the free antivirus programs we’ve selected offer real-time malware protection. Some take the fight to the browser, working to ensure you never even visit a malware-hosting site or get fooled into turning over your credentials to a phishing site.
Believe it or not, some of these freebies even beat all but the best for-pay equivalents. And since they’re free, you can try several before settling on your favorite. Read on for thumbnails of our full reviews, followed by how we evaluate free antivirus software and how to choose the right one.
Kaspersky Free is the free anchor for the Kaspersky line; the not-free Kaspersky Standard, Plus, and Premium all build on the same antivirus engine. Kaspersky’s antivirus prowess generally awes the independent testing labs, who routinely assign it perfect or near-perfect ratings. Unfortunately, we can’t recommend it anymore. Here’s why.
For years, Kaspersky has faced accusations and censure based on its Russian origins, though none of the accusations have come backed by hard evidence of malicious behavior. We at PCMag always focused on the capabilities of the products, not on the brouhaha around the company. However, the current war in Ukraine has raised the stakes. Governments and third parties are cutting ties with Kaspersky. The FCC labeled Kaspersky a national security risk.
After consideration, we can no longer recommend you purchase Kaspersky security products or even use them for free. We’ve left the reviews in place, with a warning, since they provide useful information. But at least for now, we’re removing Kaspersky products from our “Best for” lists.
If free antivirus tools are so good at protecting internet security, why should anybody pay? For one thing, many of these products are free only for noncommercial use. If you want to protect your business, you must pony up for the paid edition. You should probably consider upgrading to a full security suite at that point. After all, it’s your business’s security on the line.
Even for personal use, most for-pay antivirus tools offer more than their free counterparts—sometimes a lot more. For example, the paid editions of Adaware and ZoneAlarm add protection against malicious and fraudulent websites the free versions lack. And Panda reserves quite a few features for paying customers: firewall protection, application control, cross-platform support, and detection of insecure Wi-Fi connections.
In addition, many companies don’t offer full-scale tech support for users of their free editions. The first time you need extra help digging a particularly stubborn piece of malware out of your system, you might regret the lack of support.
Around the world, researchers at independent antivirus testing labs spend their days putting antivirus tools to the test. Some of these labs regularly release public reports on their findings. We follow four such labs closely: AV-Comparatives, MRG-Effitas, SE Labs, and AV-Test Institute.
Security companies typically pay for the privilege of being included in testing. In return, the labs supply detailed reports that can help improve their products. The number of labs that include a particular vendor serves as a measure of significance. In each case, the lab considered the product important enough to test, and the vendor felt the price was worthwhile. The labs don’t necessarily test a vendor’s free product, but most vendors pack full protection into the free product, enhancing premium versions with additional features.
In addition to carefully perusing results from the independent labs, we also run our own hands-on malware protection test. We expose each antivirus to a collection of malware samples, including a variety of different malware types, and note its reaction. Typically, the antivirus will wipe out most of the samples on sight and detect some of the remaining ones when we try to launch them. We derive a malware blocking score from 0 to 10 points based on how thoroughly the antivirus protects the test system from these samples.
Since we use the same samples month after month, the malware-blocking test doesn’t measure a product’s ability to detect brand-new threats. In a separate test, we attempt to download malware from 100 very new malicious URLs supplied by London-based testing lab MRG-Effitas, typically less than a few days old. We note whether the antivirus blocked all access to the URL, wiped out the malicious payload during download, or did nothing.
If you’re interested in learning more about our testing techniques, you’re welcome to read more about how we test security software.
Just about every antivirus product scans files on access to make sure malware can’t launch, and it also scans the entire system on demand, or on a schedule you set. Once cleaning and scheduling is done, blocking all access to malware-hosting URLs is another good way to avoid trouble. Many products extend that protection to also steer users away from fraudulent websites, phishing sites that try to steal login credentials for financial sites and other sensitive sites. A few rate links in search results, flagging any dangerous or iffy ones.
Behavior-based detection, a feature of some antivirus products, is a two-edged sword. On the one hand, it can detect malware that’s never been seen before. On the other hand, if it’s not done right, it can baffle the user with messages about perfectly legitimate programs.
Any antivirus should eliminate spyware along with other types of malware, but some products include features designed specifically for spyware protection. Features like encryption to protect your sensitive data and webcam control to prevent remote peeping typically show up in commercial products, not free ones. But some free products include features like a simple on-screen keyboard to foil keyloggers.
One easy way to keep your PC protected is to install all security updates, both for Windows and for browsers and other popular applications. Windows 11 makes it easier than ever to stay up to date, but there are plenty of security holes in older Windows versions, in popular apps, and in add-ons. Scanning for vulnerabilities in the form of missing updates is a feature most often found in commercial antivirus products, but it does turn up in some free ones. In the list below you can see which products include these useful features.
Numerous free utilities devoted entirely to ransomware protection have come on the scene in the last few years. Alas, many of those have fallen by the wayside, among them Bitdefender Anti-Ransomware, Cybereason RansomFree, CyberSight RansomStopper, and Heilig Defense RansomOff. In any case, these are useful companion products, but they don’t do the job of a full-scale antivirus utility.
There are also numerous free antivirus utilities that work solely to clean up existing malware infestations. You bring out these cleanup-only tools when you have a nasty malware problem. When the malware’s gone, they have no further use since they offer no ongoing protection. Our favorite in this category is Malwarebytes Anti-Malware, and it’s one you should try if you’ve got a malware problem. But since they’re free, you can keep trying others if the first one doesn’t do the job. When the scare is over, you’ll need a full-blown antivirus for ongoing protection.
Avast One Essential takes the place once held by Avast Free Antivirus as Editors’ Choice for free antivirus utility. It appears in lab reports from all four labs we follow with almost universally perfect scores, and it includes many suite-level features. AVG Antivirus Free uses the same antivirus engine as Avast and provides its own collection of useful bonus features—it, too, is an Editors’ Choice. If you do have a little cash in your budget for security, the best paid antivirus software does offer more and better protection. If not, try a few of these free tools and see which one you like best.
Worried you might already be infected? Check out our article on the signs you have malware.
When the IBM PC was new, I served as the president of the San Francisco PC User Group for three years. That’s how I met PCMag’s editorial team, who brought me on board in 1986. In the years since that fateful meeting, I’ve become PCMag’s expert on security, privacy, and identity protection, putting antivirus tools, security suites, and all kinds of security software through their paces.
Before my current security gig, I supplied PCMag readers with tips and solutions on using popular applications, operating systems, and programming languages in my “User to User” and “Ask Neil” columns, which began in 1990 and ran for almost 20 years. Along the way I …
PCMag is obsessed with culture and tech, offering smart, spirited coverage of the products and innovations that shape our connected lives and the digital trends that keep us talking.

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