Incorrect notifications that "Microsoft Defender Antivirus is turned off"

ISeeTWizard
18 September 2026 at 03:31
0 Comments
148 Views

Status

Resolved

Affected platforms

Client Versions	Message ID	Originating KB	Resolved KB
Windows 11, version 26H1	WI1463526	-	-
Windows 11, version 25H2	WI1463527	-	-
Windows 11, version 24H2	WI1463528	-	-
Windows 11, version 23H2	WI1463529	-	-
Windows 10, version 22H2	WI1463530	-	-
Windows 10, version 21H2	WI1463531	-	-
Windows 10 Enterprise LTSC 2019	WI1463535	-	-
Windows 10 Enterprise LTSC 2016	WI1463536	-	-

Server Versions	Message ID	Originating KB	Resolved KB
Windows Server 2025	WI1463532	-	-
Windows Server 2022	WI1463533	-	-
Windows Server 2019	WI1463535	-	-
Windows Server 2016	WI1463536	-	-
Windows Server 2012 R2	WI1463537	-	-
Windows Server 2012	WI1463538	-	-

After installing the latest updates for Microsoft Defender Antivirus, notifications might appear stating that "Microsoft Defender Antivirus is turned off," even though the antivirus is functioning correctly and all settings show it as active. These notifications can appear when Windows starts and intermittently afterward. They persist even if notification settings are turned off.

This issue can be observed in any version of Windows or Windows Server with Microsoft Defender Antivirus running with the latest Defender updates.

Resolution: This issue was resolved in the Microsoft Defender Antivirus update (version 4.18.26080.4), released on September 17, 2026.

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27 July 2026 at 10:32

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Incorrect notifications that "Microsoft Defender Antivirus is turned off"

Status

Affected platforms

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Resize EFI partition

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