Recently, a handful of Windows 11 users have reported on Microsoft forums that they are repeatedly getting warnings that their PC’s security is off. It appears that a Windows 11 antivirus bug falsely claims the system lacks protection and remains vulnerable to malware. Despite the fake warnings, Microsoft has confirmed that the Microsoft Defender built-in security tool is working normally in the background.
The false warnings don’t actually disable real background protection
According to user reports, these flags pop up as soon as you boot your PC, and they keep appearing throughout the day. Even though this Windows 11 antivirus bug suggests the system lacks protection, Microsoft Defender keeps running quietly in the background. It’s worth adding that changing your usual notification settings is not going to stop these warnings either. This is because the system warnings bypass normal controls.
This doesn’t appear to be an isolated issue, as user reports indicate the glitch has appeared on various setups. These include PCs running even Windows 10 and several business networks utilizing Windows Server environments. If you encounter this bug, checking the Defender security app will confirm that real-time protection is still active. You can safely ignore these alerts, and don’t install any third-party tools.
Microsoft is preparing an automatic update to fix the Windows 11 antivirus bug
Microsoft has officially confirmed this Windows 11 security bug exists. The company is already building a patch for the issue, so the antivirus stops warning that security is off. The Redmond tech giant acknowledged this problem on its release health dashboard and said an automatic update will soon correct the behavior.
The Microsoft Defender bug arrived soon after an August bug. The previous one caused certain programs to crash during routine malware scans, which Microsoft patched shortly after recognizing the bug.
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