Product Use case Rating
Bitdefender Antivirus Plus Best Basic Antivirus Product 4.5
Kaspersky Internet Security Best Midrange Antivirus Product 4.5
Kaspersky Total Security Best Premium PC Security Suite 4.5
Kasperky Free Antivirus Best Free Windows Antivirus 4
Kaspersky Internet Security for Mac Best Mac Antivirus 4.5
Bitdefender Mobile Security Best Android Antivirus 4

Many Windows users believe they don't need to pay for antivirus software, and many Mac and Android users think they don't need protection at all. Windows' much higher profile makes it the biggest target, but the truth is that macOS and Android are equally vulnerable to malware, even if they don't encounter as much of it.

We believe it's still worth paying for Windows antivirus software, because even the best free software leaves out some protection features we consider essential. But you don't have to spend a lot — many antivirus products are sold online for much less than their list prices. Mac and Android users have other options: Some of our favorite Mac AV products cost nothing, and most Android security apps have free versions.

Many of the big antivirus vendors' Black Friday and Cyber Monday deals have extended into December. Kaspersky Lab is taking half off all its antivirus products for Tom's Guide readers, while Bitdefender beats that by taking 60 percent off. Norton takes 40 to 55 percent off, depending on the product, and Trend Micro is offering between 25 and 66 percent off. McAfee takes 60 percent off some products, but only $5 off some others. Sophos Home is marked down 30 percent to just $35, Avast is selling its paid software at up to 50 percent off, and ESET has marked down its higher-priced packages by up to $50 off.

Latest Security Alerts and Threats

— A data breach at the question-and-answer website Quora exposed the names, email addresses and possibly passwords of 100 million users. ADVICE: If you have a Quora account — and many people don’t know they have one — make sure your old password wasn’t reused elsewhere.

— A new Adobe Flash exploit embedded in a Microsoft Office document was used to try to hack into a Russian clinic. ADVICE: Check to see if your Flash is up-to-date, or consider making it “click-to-run” or disabling it entirely.

— Two malicious fitness apps snuck into the iOS App Store and tried to rob users by tricking them into authorizing payments with their fingerprints. ADVICE: Remove “Fitness Balance” and “Calories Tracker” if you have them installed.

How We Tested

Our evaluations were based on an antivirus product's interface, performance, protection and extra features. Was the product's interface intuitive and user-friendly, or did it make it hard to find important tools? How badly did malware scans slow down the computer's performance? How good was the program at detecting and removing malware? Does the program have any additional tools, and are they useful?

All of our Windows tests were performed on the same Asus X555LA laptop running 64-bit Windows 8.1 (later upgraded to Windows 10), with an Intel Core i3 processor, 6GB of RAM and a 500GB hard drive containing 36GB of files. To assess a program's impact on system speed, we used our custom OpenOffice benchmark test, which matches 20,000 names and addresses on a spreadsheet. The longer it took the laptop to finish the test, the heavier the performance impact. For smartphones, we used the Geekbench 3 benchmarking app.

Our Mac evaluations were conducted on a late-2013 MacBook Pro running OS X El Capitan 10.11. The Mac had a 2.6-GHz Intel Core i7 CPU, 8GB of RAM and 23GB of data on a 512GB SSD. For Android, we used a Nexus 6P smartphone running Android 6.0.1 Marshmallow.

For malware-detection scores, we've used the results of four independent testing labs: AV-TEST in Germany, AV-Comparatives in Austria, SE Labs in England and our own labs in Utah. Each lab subjects the major antivirus brands' products to stress tests involving thousands of pieces of malware, including hundreds of previously unseen samples.

Windows Antivirus Software Types

Most antivirus makers have three or four tiers of Windows products, with each price bump adding extra features, such as parental controls or cloud backups. But because each company uses a single malware-detection engine for all its Windows antivirus software, the cheapest item — even a free one — in any product line usually finds malware just as thoroughly as the priciest.

Not all users will need premium suites, or even midrange products. If you don't have kids, or if you already have backup software, the basic product may be enough.

MORE: How to Buy Antivirus Software

Basic or Entry-Level Windows Antivirus

The least-expensive paid Windows antivirus products, which generally list from $40 to $60 per year depending on the number of PCs covered, have the essentials. Definition updates and scans are automatic; websites and email attachments are screened, and the products are mostly easy to use. Some basic AV programs toss in extra features, such as file shredders or system optimizers, that are normally found in pricier products.

Not only does Bitdefender Antivirus Plus have nearly perfect malware-detection scores, but it also offers great value, with a strong selection of extra tools. You'll find a built-in password manager, a secure browser, VPN client software, protection against encrypting ransomware and automatic profiles that optimize Bitdefender's impact on your system, depending on whether you're working, watching a movie or playing a game.

Midpriced Windows Antivirus

These products usually list from $60 to $80 per year. They generally build on the basic packages by bundling in parental controls and a two-way firewall to catch outgoing data, although many add other features. But for the full feature set each brand offers, you'll have to pony up for the premium products.

Kaspersky takes first place among midrange antivirus software products, thanks to its excellent malware protection, a moderate system-performance impact and a full assortment of extra features and tools. Kaspersky Internet Security includes a secure browser, a virtual keyboard, specialized protection against ransomware, webcam protection to guard your privacy and VPN client software that automatically switches on when you connect to an unsafe Wi-Fi network.

Premium Windows Antivirus

Top-tier packages are often called suites because they do much more than catch malware. They might also offer file encryption, secure online storage, a password manager or an ad blocker. As most suites cover multiple devices, they also frequently bundle in licenses for Mac and Android antivirus software. For all this, you're meant to pay between $80 and $100 per year — but as with all paid antivirus software, steep discounts can often be found online.

Kaspersky Total Security has it all for those who want more than just excellent malware detection. This one rose to the top because it eliminates threats without generating many annoying false positives. We also like the included secure browser, which is ideal for online banking and shopping. Other highlights include a thorough file shredder and Windows backup and recovery software.

Free Windows Antivirus

Free Windows antivirus products have gotten much better, and our top two choices offer excellent malware detection, if little else. The others provide adequate protection with a smattering of goodies such as password managers or parental controls. Among those is Microsoft's built-in Windows Defender, which has risen to the middle of our rankings. However, free antivirus software generally leaves out extra protection features such as dedicated defenses against ransomware or spam blockers.

Kaspersky Lab largely keeps quiet about its free antivirus product, but it's a winner, with a user-friendly interface, a fairly light system-performance impact and Kaspersky's nearly flawless malware protection. Just don't expect anything from it but the bare necessities.

Mac Antivirus

Despite what Apple's marketing has implied, Macs do get infected, and the amount of Mac malware keeps rising, with more seen in the first half of 2017 than in any previous year. But there's less money to be made in the Mac antivirus market than in the Windows one, and the products are less standardized. Some Mac antivirus products are free, and some are paid. Of the products we recently evaluated, one of our No. 2 choices, Avast Free Mac Security, doesn't cost a dime.

Kaspersky Internet Security offers both the lowest system impact and some of the best malware-detection rates recorded. It even provides extra security features, including parental controls and options to lock down your webcam and stop websites from tracking your browsing activity. If you're willing to pay to protect your Mac from malware, Kaspersky Internet Security is the best option available.

Android Antivirus Apps

Every Android device, whether it's a smartphone, tablet or TV stick, should have antivirus software. Usually, that software comes with an all-encompassing security app that also includes anti-theft and remote-locating features, and many apps have both a basic free version and a premium version with more features.

The free versions of the Android security apps we reviewed are pretty solid. The paid versions, which cost between $15 and $30 per year, range from being just a bit better than the free ones to becoming practically separate products, with a wide range of capabilities. You'll have to decide what you need and select accordingly.

The Bitdefender Android security app has flawless malware protection, a small performance hit, privacy-protection tools and Android Wear integration. Yet there are no scheduled malware scans, and no freemium option. (The separate Bitdefender Antivirus Free for Android only scans for malware.) Still, at $15 per year per device, Bitdefender Mobile Security is worth the expense.

iOS Antivirus Apps

A lot of people want iOS antivirus software for their iPhones and iPads. The truth is that such software doesn't exist. Apple won't let third-party apps examine other iOS apps, or even inspect new apps as they're installed. Anything that claims to be antivirus software swiftly gets kicked out of the iTunes App Store.

Many major antivirus vendors, including F-Secure, McAfee, Norton and Trend Micro, do have "security" apps in the App Store. But these check web links for known malicious sites, locate lost devices or pretend to protect your privacy. None scans an iPhone for malware.

There has been real iOS malware that affects non-jailbroken devices, but it's very rarely cropped up. In each instance, Apple has pushed out a new version of iOS to stop the malware in a matter of days or weeks. Generally, if you keep your Apple mobile device updated to the latest version of iOS, you should be safe.

[Editor's Note, Oct. 11, 2017: Best Buy has removed Kaspersky Lab products from its shelves, citing concerns regarding Kaspersky's alleged (but as yet undocumented) ties to the Russian government. Top U.S. newspapers have run stories in which anonymous sources say Kaspersky software helps Russia spy on American spy agencies. However, until we see real evidence that Kaspersky software is a threat to consumers, we will continue to recommend it. Here is further clarification of our position.]



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  • martinsmith123
    I will prefer Kaspersky antivirus licensed software
  • punkncat
    So wait, wasn't Kapersky implicated in a security vulnerability that the AV software was providing metrics on user data and phoning home with it?
  • dleippe
    Is that a question or a statement
  • stones710
    I don't see anything about a virtual keyboard in Bitdefender; how do I find it and how does it work?
  • punkncat
    Anonymous said:
    Is that a question or a statement


    This symbol "?" at the end of a statement makes it a question in the typical world of grammar. Normally the language structure and wording is fairly indicative as well, however I can see where you would be confused with the statement.
    It was a question based on a recollection of an article I read recently indicating as much. Couldn't find the link, of course.
  • Rocky Bennett
    Anonymous said:
    So wait, wasn't Kapersky implicated in a security vulnerability that the AV software was providing metrics on user data and phoning home with it?



    Yes they were. It made the national news for a few days then blew over.
  • chris240b
    Do the authors of these articles take into consideration anything except how well they perform as antivirus software? Kaspersky has been implicated in data breeches at the NSA and other government and corporations around the world. They apparently work with the Russian government for nefarious reasons.
  • Rocky Bennett
    ^^^ This has never been proven. Can you link an article that proves your statements.
  • emkei
    Kaspersky Total Security is my choice because of its' real-time defense against the latest malware and threats. Also, because it offers nearly everything I could want in a security suite.
  • stephaniefernandez0000
    I have never used anything except Avast Antivirus and I'm personally satisfied with this product. So easy to use and everything is available on your finger tips. Instead of that, it also gives about a month of free trail and I'm not satisfied with this article because of not mentioning Avast in this article.
  • ElectrO_90
    Comodo Security and ZHPCleaner - Free and the best :)
  • Rocky Bennett
    Windows Defender, free and the best!!!!
  • Peter Martin
    windows defender. I'm like Scotty, see, the more crap you put into it, the more complex the plumbing becomes and they you have problems. Don't mess with the best and add junkware
  • greg.k.taylor.sr
    Bitdefender is Romanian, Kaspersky Anti-Virus is Russian, AVAST is Czec and Panda Security is Spanish.
    PC Matic is USA and I trust it over any of the above foreign manufactors software. I use to use Avast
    becasue it was one for free but all of them are using an outdated Blacklist where PC Matic is useing
    their newest Whitelist that catches the latest viruses and malware. It to me is much more safer to use
    that any foreign company. Oh and I forgot Norton is Indian which is another reason I will not use
    Life Lock to protect my $$$$. Don't leave your expensive systems to foreign entities.
  • darren.talcott
    Bitdefender is Romanian, Kaspersky Anti-Virus is Russian, AVAST is Czec and Panda Security is Spanish.
    PC Matic is USA and I trust it over any of the above foreign manufactors software. I use to use Avast
    becasue it was one for free but all of them are using an outdated Blacklist where PC Matic is useing
    their newest Whitelist that catches the latest viruses and malware. It to me is much more safer to use
    that any foreign company. Oh and I forgot Norton is Indian which is another reason I will not use
    Life Lock to protect my $$$$. Don't leave your expensive systems to foreign entities.

    Don't forget Symantec is owned by the Chinese Government. That is why the DoD dropped them a few years back.
  • jpf.morpheus
    How on earth is Kaspersky getting recommended?? It is banned for use by any federal agency or contractor and has been documented as a portal for espionage, bots, malware distribution, and is a Russian company owned by a Putin Oligarch with FSB ties...jeeze..get real.
  • ishawnmike
    I'll recommend Avast antivirus. :)
  • Robert Ban
    Nothing beats good old Hitman, RogueKiller and good old Malwarebytes (I don't use real time scan, nor it is active , just for occasional scanning).
    You use Antivirus cause you are going to sketchy sites, if you used good sites, you wouldn't need for that.
    Also to mention, keep Windows on seperate patrition, chances are less that it will infect the other, since my 1st infection or any other, I never had infection on other patritions (Small viruses, not the crap that locks out and asks for payment).
  • SR-71 Blackbird
    Or like I do , Run Linux.