What’s New in Windows 10 Cumulative Update KB4530684

The December 2019 Patch Tuesday rollout also includes a new cumulative update for Windows 10 version 1903 and Windows 10 version 1909.

The two Windows 10 releases share the same cumulative update because they are based on a common core operating system and identical set of system files. The only difference between them is that minor new features are added in Windows 10 version 1909, but they are activated by Microsoft with an enablement package shipped separately.

The new cumulative update that is available today for the two Windows 10 versions is KB4530684, and it increases the OS build number to 18362.535 for Windows 10 version 1903 and 18363.535 for Windows 10 version 1909.

The changelog

There are three improvements in this cumulative update, and the most obvious one is the pack of security fixes for the operating system. KB4530684 brings security updates to Windows Virtualization, Windows Kernel, the Microsoft Scripting Engine, and Windows Se...