Over the weekend, security researcher Abdelhamid Naceri (also known as Nightmare Eclipse) released another Microsoft Defender zero-day exploit that blocks antivirus updates.

On some PCs, Windows 11 has been incorrectly warning that Microsoft Defender is turned off, even when it isn't, for almost ...

Serial Microsoft zero-day leaker NightmareEclipse has found another way to mess with Windows Defender, this time by stopping ...

Want to know how to disable Windows Defender in Windows 11? In this step-by-step tutorial, I’ll show you how to turn off Microsoft Defender Antivirus and manage Windows Security settings on your ...

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

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. Microsoft Defender is a ...

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

A patch Microsoft released on Wednesday to fix a zero-day vulnerability in its Defender security engine may cause Windows machines to write files large enough to completely consume available disk ...

To permanently remove Windows Security, use Local Group Policy Editor, Windows Registry tweaks, or the Windows Defender Remover tool. Be cautious— removal can leave your PC vulnerable. Always back up ...