Don't-Miss Security Stories
This surveillance system's cameras are easy to deploy, configure, and monitor, but you're limited to six of them.
Software can protect your business from cyberthreats--but these tools can help keep it physically secure.
RadarSync is a comprehensive, complete tool for identifying and updating outdated drivers.
HijackThis, useful as ever but now open source, helps you spot anomalies in your Windows and program installations.
ZoneAlarm's first free antivirus/firewall suite makes its debut. PCWorld examines its features.
We liked Microsoft Security Essentials' interface, but other products did a better job at blocking malware.
In our tests, PC Tools AntiVirus Free did a decent job removing malware, but its real-world malware detection left something to be desired.
Although Comodo Internet Security's firewall makes this freeware look tempting, its antivirus protection lagged compared to others we tested.
Malwarebytes Anti-Malware Free's defense against zero-day exploits makes it a useful addition to your antimalware toolkit.
Speed and a low rate of false positives are Avira Free Antivirus's best points.
Panda Cloud Antivirus did well at detecting malware infections, but had trouble cleaning them up.
In our tests, Avast Free Antivirus did well at battling known malware and less impressively at recognizing new threats.
Best as a supplement to your existing antivirus software, ThreatFire Free excels at detecting and blocking new threats.
Good test results in malware detection--and best-in-class at removal--bring AVG Anti-Virus Free Edition to the top.
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.