Don't-Miss Security Stories

Logitech Alert 750e Outdoor Master System Review: Terrific Resolution, but Supports Only Six Cameras

This surveillance system's cameras are easy to deploy, configure, and monitor, but you're limited to six of them.

Keeping an Eye Out: We Review Three Video Surveillance Systems

Software can protect your business from cyberthreats--but these tools can help keep it physically secure.

Find and Update Out-of-Date Drivers With RadarSync PC Updater

RadarSync is a comprehensive, complete tool for identifying and updating outdated drivers.

Stop Spyware in Its Tracks With Open-Source HijackThis

HijackThis, useful as ever but now open source, helps you spot anomalies in your Windows and program installations.

First Look: ZoneAlarm Free Antivirus + Firewall Launches Today

ZoneAlarm's first free antivirus/firewall suite makes its debut. PCWorld examines its features.

Microsoft Security Essentials 2.1

We liked Microsoft Security Essentials' interface, but other products did a better job at blocking malware.

PC Tools AntiVirus Free 2012

In our tests, PC Tools AntiVirus Free did a decent job removing malware, but its real-world malware detection left something to be desired.

Comodo Internet Security Premium

Although Comodo Internet Security's firewall makes this freeware look tempting, its antivirus protection lagged compared to others we tested.

Malwarebytes Anti-Malware Free

Malwarebytes Anti-Malware Free's defense against zero-day exploits makes it a useful addition to your antimalware toolkit.

Avira Free Antivirus

Speed and a low rate of false positives are Avira Free Antivirus's best points.

Panda Cloud Antivirus

Panda Cloud Antivirus did well at detecting malware infections, but had trouble cleaning them up.

Avast Free Antivirus

In our tests, Avast Free Antivirus did well at battling known malware and less impressively at recognizing new threats.

PC Tools ThreatFire Free

Best as a supplement to your existing antivirus software, ThreatFire Free excels at detecting and blocking new threats.

AVG Anti-Virus Free Edition

Good test results in malware detection--and best-in-class at removal--bring AVG Anti-Virus Free Edition to the top.

Free Antivirus You Can Trust

Can a free download really protect your PC? Yes, but you have to choose the right one. Our lab tests identify the most reliable no-cost security programs.