Two well-known antivirus brands see their protection scores drop, while Microsoft's built-in Windows Defender slips only a little.
It's getting better, but Windows' built-in protection isn't strong enough compared to superior stand-alone free and paid antivirus software.
BullGuard Antivirus is fairly easy to use and offers lots of customization options, but its malware protection is only so-so.
ESET NOD32 Antivirus has a clean, easy-to-use interface and a light system load. Too bad its malware protection is average at best.
F-Secure Anti-Virus offers excellent malware protection at a bargain price, but it has a heavy system load and a high false-positive rate.
How do two of our best-reviewed antivirus suites stand up in a head-to-head comparison? One may be good, but the other is clearly better.
AV-TEST evaluated 25 Android AV programs that can keep your phone or tablet safe, but only four of them earned perfect scores.
The antivirus firm Bitdefender has a new version of its free anti-ransomware tool, which protects against three common ransomware strains.
Bitdefender loses its crown, and Trend Micro reaches new heights, in AV-TEST's latest evaluation of antivirus products on Windows 7.
Many brands of antivirus software have serious flaws that undermine Windows security and make computers more vulnerable to attack.
Antivirus software company Avast's own 'safe' Web browser has a dangerous flaw that exposes users' entire hard drives.
If you use Malwarebytes Anti-Malware to protect your computer, make sure you update it during the next month to patch a nasty flaw.
Our top pick for Android antivirus software, Avast Mobile Security, has eliminated its premium pricing and is now entirely free.
Trend Micro antivirus software let attackers take over computers and exposed user passwords until a Google researcher found the flaws.
Panda Antivirus Pro 2016 catches nearly all malware and lets you create your own interface, but it threw up several false positives.
It's slow and missed some dangerous software, but Avast Pro Antivirus offers a password manager and protection against website redirects.
Kaspersky Anti-Virus combines fast scans with safeguards against ransomware, but its protection isn't perfect and it can be hard to navigate.
It may not be the most thorough at finding and removing malware, but McAfee's AntiVirus Plus is a bargain for large families.
Avira Antivirus Pro is quick to set up, offers nearly flawless malware protection and has some useful features Avira Free Antivirus lacks.
Bitdefender Antivirus Plus has tough malware scans, little system impact, ransomware protection, a password manager and a file shredder.
MacKeeper sells itself as a security and optimization suite for Mac OS X, but it has trouble keeping its own corporate systems secure.
Clicking an ad on a Comcast Xfinity search results page led users down a painful path featuring ransomware and the long-running Windows Tech Support scam.
The Web won't get safer by itself -- you've got to do your part, and for the most part, you haven't been. Here are 10 ways to start.
Four of the 20 Windows 10 antivirus programs tested received perfect ratings, but a few questionable products fell well short of the mark.
Bitdefender Internet Security 2016 has nearly perfect malware protection, a strong feature set and a remarkably light system impact.
ESET Smart Security 9 includes some unique features, like a stolen laptop tracker, but its malware protection isn't good enough.
Kaspersky Internet Security is a solid antivirus package, but is weaker at finding sophisticated malware on Windows 7 than some competitors.
Trend Micro Internet Security 10 has a perfect record of stopping malware, but it has a somewhat heavy system impact during scans.
McAfee Internet Security is a solid, if not stellar, antivirus suite that protects an unlimited number of devices across multiple platforms.
Most of the popular Android security suites work very well, but a handful fall well below acceptable safety and usability parameters.