This post will show you what you can do if System Guard is enabled but not running in your Windows 11 or Windows Server system. You may have enabled System Guard ...

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Update: Added statement from Microsoft to the end of this article. A security researcher has released a new Microsoft Defender zero-day exploit named "RoguePlanet" just hours after Microsoft fixed two ...

Two zero-day flaws in Microsoft Defender, the antivirus engine built into every Windows installation, are already being exploited by attackers to gain elevated privileges on target systems. Both ...

This method involves modifying a Registry value called DisableAntiSpyware. In older versions of Windows, this policy key was used by OEMs and IT administrators to disable Microsoft Defender Antivirus ...

A zero-day vulnerability in Microsoft Defender lets attackers gain full system access on up-to-date Windows 10 and 11 PCs. No ...

BlueHammer became public on April 2 in an unusual fashion. A researcher using the names Chaotic Eclipse and Nightmare Eclipse ...

The long-running feud between Microsoft and security researcher Nightmare Eclipse has entered a new chapter. Eclipse, who has spent the past several months publicly releasing unpatched Windows ...

CISA confirmed on Monday that ransomware gangs are now exploiting a Microsoft Defender privilege escalation vulnerability, dubbed BlueHammer, that has previously been abused in zero-day attacks.

A new Windows zero-day reportedly bypasses BitLocker, adding pressure on Microsoft as researchers debate the exploit’s real-world impact. A new Windows zero-day has turned BitLocker, one of ...

Microsoft Defender offers great protection from malware -- but there are other online threats you might want to consider, too ...