Microsoft: Dont install Windows 10 1809 October 15 update, it breaks Defender ATP
Summary
Microsofts second monthly cumulative update on October 15 for Windows 10 version 1809 contained only non-security fixes, but it may cause a security problem for organizations that rely on Windows Defender Advanced Threat Protection (ATP). The reason its advising customers not to install the update is that Microsoft Defender ATP security tools "might stop running and might fail to send reporting data". Thats not good news for enterprises that rely on Defender ATP for antivirus, monitoring endpoint devices, and threat intelligence. Fortunately the second cumulative update each month is not mandatory to install, but those that have done so already might run into the problem Microsoft describes in its issues page for Windows 10 version 1809. "The Microsoft Defender Advanced Threat Protection (ATP) service might stop running and might fail to send reporting data.