Microsoft has resolved a known issue that causes incorrect alerts warning that Defender Antivirus was turned off after installing recent updates.

Think Windows 11's antivirus is broken? Thankfully it isn't, although the app is suffering from a pretty frustrating bug.

After installing the latest Defender Antivirus update for Windows 11, users have started reporting that their operating ...

Want to know how to enable Windows Defender in Windows 11? In this easy step-by-step tutorial, I’ll show you how to turn on Windows Defender Antivirus and check your Windows Security settings to help ...

Microsoft fixes false Defender Antivirus disabled alerts with version 4.18.26080.4, resolving the issue across supported ...

Compare the best antivirus protection options for 2026, from free antivirus tools to paid security suites with VPN, identity, ...

The glitch, which Microsoft says it working to fix, creates an attacker opportunity by convincing users to ignore critical cybersecurity alerts.

A researcher released ShieldCrash on September 8, claiming it bypasses Microsoft's Defender fix for flaw CVE-2026-69414.

Microsoft has resolved a bug that caused Windows Defender to crash after a recent security update, resulting in 0xc0000005 access violation errors on some affected systems.

With the constant and evolving threat of malware, Windows Defender Antivirus employs a series of technologies to keep Windows Server protected. While malware incidents can disrupt the workplace when ...

Microsoft Defender Antivirus, formerly known as Windows Defender, is a built-in antivirus and antimalware service that comes with Windows 10, Windows 11 and some versions of Windows Server. In its ...

Our team tests, rates, and reviews more than 1,500 products each year to help you make better buying decisions and get more from technology. Microsoft Defender Antivirus does a decent job of securing ...