Microsoft announces that Windows Defender is the victim of a bug

Microsoft confirms that the native antivirus of Windows, Defender is the victim of a bug. Its origin is not related to a cumulative update but to a security update.

One of the latest updates targeting Microsoft Defender comes with a pesky bug. It is at the origin of the deletion of its shortcuts present on the desktop and in the Start menu. Microsoft explains that this issue was discovered after said update went live. This is the “Security Intelligence” update in version 1.381.2140.0.

The issue affects all supported versions of Windows. It ranges from Windows 10 20H2 to Windows 11 22H2. On the other hand, the bug was not detected on the Server editions of these operating systems. Redmond adds

After installing security update 1.381.2140.0 for Microsoft Defender, application shortcuts in the Start menu, pinned to taskbar, and desktop may be missing or removed. Also, errors may be observed when trying to run executable (.exe) files that have dependencies on shortcut files. The Atack Surface Reduction (ASR) policy “Block Win32 API calls from an Office macro” is enabled on affected devices.

After installing Security Intelligence build 1.381.2140.0, detections resulted in the deletion of some Windows shortcut files (.lnk) that matched the incorrect detection pattern.

The good news is that a fix is ​​already live. Its deployment has also begun. On the other hand, if you are concerned, it does not restore the deleted shortcuts. Its purpose is only to prevent other shortcuts from being deleted.

The software giant notes

This issue is resolved in Security Intelligence Update version 1.381.2164.0. Installing the Security Intelligence update build 1.381.2164.0 or later should avoid the issue, but it will not restore previously deleted shortcuts. You will need to recreate or restore these shortcuts through other methods.

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