The majority of the updates that come through Windows Update are for Windows Defender, and for good reason. Windows Defender helps make your antimalware and other security protections stronger.
The glitch, which Microsoft says it working to fix, creates an attacker opportunity by convincing users to ignore critical cybersecurity alerts.
Microsoft confirmed a bug in recent Defender updates that's triggering incorrect "antivirus disabled" warnings across Windows 10, 11, and Server.