Windows 11 is warning people that Defender Antivirus has been turned off, but don’t worry, says Microsoft

Windows 11’s integrated security solution, Microsoft Defender Antivirus, is designed to provide robust protection from the moment the operating system is launched. However, users have recently reported an unsettling trend: persistent notifications indicating that “Microsoft Defender Antivirus is turned off,” despite the software functioning correctly. This has understandably raised concerns among users who rely on the antivirus for their digital safety.

Windows 11 is showing a “Microsoft Defender Antivirus is turned off” notification even when it’s on

It’s a little scary, but everything is fine under the hood

In response to these alerts, Microsoft has acknowledged the issue, clarifying that it stems from a bug rather than a genuine malfunction of the antivirus. The company has updated its documentation regarding known issues for Windows 11, version 25H2, which includes a section specifically addressing this notification problem.

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.

For those experiencing this glitch, the recommendation is straightforward: verify that Microsoft Defender Antivirus is indeed active. If the settings confirm that it is operational, users can rest assured that their system remains protected. The notifications are merely false alarms, and a fix is on the horizon.