Microsoft Defender isn't bad, but it's not enough to fully protect your PC. You don't have to pay extra, though—just use one of the top free antivirus apps we've tested.

Microsoft's Secure Boot certificates expire in June, and unless you've enrolled in its 'Extended Security Updates' program, the OS will fall into a 'degraded security state', Microsoft says.

Microsoft plans Windows 11 “secure by default” mode with signed apps only and Android-style permissions for files, camera, ...

Windows 11 is adding Baseline Security Mode to block unsigned apps, services, and drivers by default, plus new consent prompts for sensitive access and bundled installs, with exceptions when needed ...

In the summer of 2024, corporate anti-malware provider CrowdStrike pushed a broken update to millions of PCs and servers running some version of Microsoft’s Windows software, taking down systems that ...

February 2026 Patch Tuesday restricts Windows credential autofill to fix a Windows Hello input injection flaw (CVE-2026-20804 ...

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Update, March 31, 2025: This story, originally published March 29, has been updated with an explanation of LOLBINS as well as further technical information regarding the Windows Defender Application ...

ClickFix attack employs fake Windows security udpates. Updated November 27 with another Windows update warning, along with threat intelligence from the Acronis Threat Research Unit regarding the use ...

If you're still using Windows 10, another critical defence in its security protections will expire soon. Microsoft is retiring Security Boot — a feature focused on blocking "untrusted code" so your ...