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Learn about the latest online threats and how you can protect your PC or mobile device—and your privacy. Check out our guides and security downloads for all platforms.


From maintenance utilities and image editing software to security tools and torrent clients, these are the very best free Windows apps.


Here are in-depth reviews of top mobile security suites in 2014. Our winner combines the best in Android antivirus protection and functionality.

Downloads for Security

software editor's choice
  • Nsauditor Network Security Auditor - free

    Nsauditor Network Security Auditor is a shareware suite of comprehensive protection that you will identify vulnerabilities for Windows based PC.

    available for : windows
  • Microsoft Security Essentials - free

    Microsoft Security Essentials is a free software with security features all together.

    available for : windows
  • BitDefender Internet Security - free

    BitDefender Internet Security is a complete protection to avoid all threats that may enter or harm your computer system.

    available for : windows
See "Security" downloads
news - APRIL 15 3

The Canadian tax agency and a U.K. parenting website are the first confirmed instances of Heartbleed exploits, experts say.

news - APRIL 14 3

At Eleven Madison Park in Manhattan, the maître d' uses Google to greet guests by name and learn their birthdays and other interests.

news - APRIL 14 14

With most of their computers still running XP, the IRS will pay Microsoft millions for extra security support as they slowly upgrade to 7.

news - APRIL 12 0

Tax time is Christmas for identity thieves, who use all sorts of tricks to separate you from your money. Here's how to beat them.

news - APRIL 11 23

Did the NSA know about the Heartbleed bug for the past two years? Two anonymous sources told Bloomberg News the agency did.

news - APRIL 11 2

A federal appeals court threw out the conviction of Andrew 'Weev' Auerheimer, a hacker in prison for scraping data from a public website.

news - APRIL 11 0

The Heartbleed Internet security flaw has made a mess that might not be cleaned up for a while. Here are useful links and information.

news - APRIL 11 2

Lookout Mobile Security's new app Heartbleed Detector checks to see if your Android phone is vulnerable to the Heartbleed bug.

news - APRIL 11 2

Google boosts Android security with a feature that scans installed apps to make sure they haven't gotten any malicious updates.

news - APRIL 11 2

Sometimes free is just as good.

news - APRIL 10 0

Were you tricked into downloading the Lightspark Player Pro adware, or just sick of the popups? Here's how to get rid of it.

news - APRIL 10 5

Does Heartbleed mean you have to change all your passwords? Nope. Here's the breakdown on what has to, and doesn't have to, change.

news - APRIL 10 0

Be skeptical of emails urging you to change your passwords due to the Heartbleed bug—there's a good chance they may be phishing scams.

news - APRIL 10 0

A security engineer hacked the university servers to demonstrate how vulnerable they were, and found himself facing down the FBI.

news - APRIL 9 4

All of Yahoo is potentially at risk thanks to the Internet-wide Heartbleed security bug. Here's how to re-secure your account.

news - APRIL 9 11

Worried about the Heartbleed bug affecting millions of websites? Here's a step-by-step guide on what you can do to protect yourself.

news - APRIL 9 9 has been charged by the FTC for stealing personal Facebook data and creating user profiles without permission.

news - APRIL 8 2

Microsoft releases 11 critical and important security patches, including the last updates for Windows XP and Office 2003.

news - APRIL 8 4

Russia has little interest in stopping the crime syndicate behind the Neiman Marcus data breach, Bloomberg Businessweek reports.

news - APRIL 8 5

A devastating flaw called the Heartbleed bug may have caused millions of websites to leak critically sensitive data over the past two years.

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