Microsoft Defender is improving, but you still shouldn't rely on it by itself. That doesn’t mean you have sầu khổng lồ pay extra, though. We’ve tested the top không lấy phí antivirus apps so you can protect your PC for không tính tiền.

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Kaspersky Security Cloud Free offers full-scale malware protection along with some suite-màn chơi features. It gets superb scores from the independent labs, and it won't cost you a penny.
AVG AntiVirus Free offers precisely the same excellent antivirus protection engine as Avast Free Antivirus, with useful bonus features.
Avira Free Security goes beyond basic antivi khuẩn with dozens of security-related utilities. However, many require payment for full functionality.
Microsoft Defender Antivi khuẩn protects Windows 10 PCs that have no other antivirus protection. It does the job, but still won’t beat the best không tính phí or paid third-buổi tiệc nhỏ antivirut tools.
If you’re going khổng lồ replace the antivirut built inlớn Windows with a third-buổi tiệc nhỏ không lấy phí solution, you want one that will beat the OS's integrated protection. Adaware Antivi khuẩn Free is improving, but it still doesn’t meet that standard.
Chechồng Point ZoneAlarm Free Antivirus+ combines Kaspersky-powered antivirus with an effective firewall, but it lacks protection against malicious và fraudulent websites, and some of its bonus features don't work.
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Table of ContentsTable of ContentsReturn khổng lồ The TopFree Antivi khuẩn vs. Paid AntivirusIndependent Antivirus Lab Test ResultsWe Test Malware Protection Useful FeaturesWhat"s Not Here?Which Free Antivirut Is Best?Compare Specs: Our Picks Side by Side

You say you’ve maxed out your budget buying holiday gifts, & you don’t have sầu anything left khổng lồ pay for antivirus protection? Don’t worry. You don’t have sầu to go out unprotected inkhổng lồ the storm of malware and hackers that the modern mạng internet represents. You can bundle up your computers in the warm, fuzzy protection of an effective sầu antivi khuẩn without dipping into lớn your funds. The best không tính phí third-buổi tiệc ngọt antivi khuẩn programs handily outperkhung Microsoft Defender, the antivirut built into lớn Windows. In fact, they rate better than many commercial programs. We’ve sầu analyzed dozens of products, both không tính phí và commercial antivi khuẩn, so you can make the best choice for your situation. With không lấy phí antivirut tools you get the added benefit of taking several out for a spin before making the final choice.

Your antivi khuẩn should definitely have the ability khổng lồ root out existing malware, but its ongoing task is khổng lồ prsự kiện ransomware, botnets, Trojans, and other types of nasty programs from getting a foothold. All the antivirus programs in this collection offer real-time malware protection. Some take the fight khổng lồ the browser, working hard khổng lồ ensure you never even browse to a malware-hosting site, or get fooled inkhổng lồ turning over your credentials lớn a phishing site.
Since 1982, has tested và rated thousands of products khổng lồ help you make better buying decisions.(Read our editorial mission.)

Free Antivirut vs. Paid Antivirus

If không lấy phí antivirut tools are so great, why should anybody pay? For one thing, quite a few of these products are không tính phí only for noncommercial use; if you want khổng lồ protect your business, you must pony up for the paid edition. At that point, you should probably consider upgrading khổng lồ a full security suite. After all, it"s your business"s security on the line.

Even for personal use, most for-pay antivi khuẩn tools offer more than their không tính phí counterparts—sometimes a lot more. For example, the paid editions of Adaware & ZoneAlarm add protection against malicious & fraudulent websites the free versions laông chồng. And Pandomain authority reserves quite a few features for paying customers, ahy vọng them firewall protection, application control, cross-platkhung tư vấn, và detection of insecure Wi-Fi connections.

In addition, many companies don"t offer full-scale tech tư vấn for users of the không tính phí edition. The first time you need extra help digging a particularly stubborn piece of malware out of your system, you might regret the laông xã of support.

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Independent Antivirus Lab Test Results

Around the world, researchers at independent antivirut testing labs spkết thúc their days putting antivirus tools lớn the kiểm tra. Some of these labs regularly release public reports on their findings. We follow four such labs closely: AV-Comparatives, MRG-Effitas, SE Labs, & AV-Test Institute. We also take note of whether vendors have contracted for certification by ICSA Labs và West Coast Labs.

Security companies typically pay for the privilege of being included in testing. In return, the labs supply them with 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 lớn demo, và the vendor felt the price was worthwhile. The labs don"t necessarily test a vendor"s không tính phí product, but most vendors pachồng full protection into lớn the không tính tiền hàng hóa, enhancing premium versions with additional features.

We Test Malware Protection

In addition lớn carefully perusing results from the independent labs, we also run our own hands-on malware protection chạy thử. We expose each antivirut khổng lồ a collection of malware samples, including a variety of different malware types, và note its reaction. Typically, the antivirus will wipe out most of the samples on sight và detect some of the remaining ones when we try to lớn launch them. We derive sầu a malware blocking score from 0 to 10 points based on how thoroughly the antivirus protects the thử nghiệm system from these samples.

Since we use the same samples month after month, the malware-blocking chạy thử doesn"t measure a product"s ability to lớn detect brand-new threats. In a separate thử nghiệm, 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 antivi khuẩn blocked all access khổng lồ 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 khổng lồ read more about how we thử nghiệm security software.

Useful Features

Just about every antivirut product scans files on access khổng lồ make sure malware can"t launch, & also scans the entire system on demvà, or on a schedule you set. Once that cleaning and scheduling is done, blocking all access khổng lồ malware-hosting URLs is another good way khổng lồ avoid trouble. Many products extover that protection to also steer users away from fraudulent websites, phishing sites that try to steal login credentials for financial sites và other sensitive sites. A few rate links in tìm kiếm results, flagging any dangerous or iffy ones.

Behavior-based detection, a feature of some antivirut products, is a two-edged sword. On the one hvà, it can detect malware that"s never been seen before. On the other h&, if it"s not done right, it can baffle the user with messages about perfectly legitimate programs.

Any antivi khuẩn should eliminate spyware along with other types of malware, but some products include features designed specifically for spyware protection. Features lượt thích encryption to lớn protect your sensitive sầu data and webcam control to prevent remote peeping typically show up in commercial products, not không tính phí ones. But some free products include features lượt thích a simple on-screen keyboard to lớn foil keyloggers.

One easy way to lớn keep your PC protected is lớn install all security updates, both for Windows & for browsers and other popular applications. Windows 10 makes it easier than ever lớn stay up to lớn date, but there are plenty of security holes in older Windows versions, in popular apps, and in add-ons. Scanning for vulnerabilities in the size of missing updates is a feature most often found in commercial antivirus products, but it does turn up in some miễn phí ones. In the danh sách below you can see which products include these useful features.

What"s Not Here?

Numerous không lấy phí utilities devoted entirely to ransomware protection have come on the scene in the last few years. Alas, many of those have sầu fallen by the wayside, among mỏi them Bitdefender Anti-Ransomware, Cybereason RansomFree, CyberSight RansomStopper, và Heilig Defense RansomOff. In any case, these are useful companion products, but they don"t vì the job of a full-scale antivirus utility.

There are also numerous miễn phí antivirut utilities that work solely lớn 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, & it"s one you should try if you"ve got a malware problem. But since they"re không tính tiền, you can keep trying others if the first one doesn"t vì the job. When the scare is over, you"ll need a full-blown antivirut for ongoing protection.

Which Free Antivirus Is Best?

The new Avast One Essential takes the place of Avast Free Antivi khuẩn as Editors" Choice for không tính tiền antivirut utility, while Kaspersky Security Cloud Free remains the other Editors" Choice. Both appear in lab reports from all four labs we follow. Kaspersky earned near-perfect scores, & Avast came cchiến bại. Both products offer quite a bit more than simple antivirus. If you do have a little cash in your budget for security, the best paid antivi khuẩn software does offer more và better protection. If not, try a few of these không tính tiền tools và see which one you lượt thích best.

Worried you might already be infected? Chechồng out our article on the signs you have sầu malware.