KB4530684 for Windows 10 19H1&19H2 to Build 18362.535 & 18363.535

Windows 10 has just now received a new cumulative update KB4530684 on Patch Tuesday of December 2019. Focusing on build 18362.535 & 18363.535, Microsoft works on some improvements to the operating system for 1903 and 1909 respectively. In this patch, the Windows 10 team mainly addresses Error 0x3B in cldflt.sys, OOBE, and provide security updates to various applications like Windows Kernel.

You can either download KB4530684 cumulative update manually or let Windows do it for you. Moreover, manual installation is an alternative option when you fail to get the patch. For this, simply get access to the Update & Security category and select Check for updates. Besides, you can also check the Cumulative Update Complete patches by visiting Windows 10 Cumulative Updates List. See the details ahead.


General Fixes and Improvements for KB4530684

In this context, we illustrate the new fixes and improvements that came along with this release separately for both the 1903 and 1909 versions. 

Windows 10, version 1909

The key changes are as follows –

  • Build 18363.535 comprises all the improvements from Windows 10, version 1903.
  • Furthermore, no additional issues were documented for this release.

Windows 10, version 1903

The key features of this security update “KB4530684” are as follows –

  • Microsoft team works on an issue that might cause error 0x3B in cldflt.sys on some devices.
  • Build 18362.535 addresses an issue that might restrict you from creating a local user account using the Input Method Editor (IME) for Chinese, Japanese, or Korean languages. This issue basically occurs when setting up a new Windows device during the Out of Box Experience (OOBE).
  • With KB4530684, the team provides security updates to Windows Virtualization, Windows Kernel, the Microsoft Scripting Engine, and Windows Server.

Note – As per the software giant, this release also contains updates for Microsoft HoloLens (OS Build 18362.1042) released on December 10, 2019. Microsoft team will roll out an update directly to the Windows Update Client to enhance Windows Update reliability on Microsoft HoloLens that have not updated to this most recent OS Build.

KB4530684 Known Issues

With this update, the Microsoft team has not introduced any issues yet.

How to get this update

Before proceeding further, make sure to install the following Servicing stack updates on your PC-

1. Through Windows Update

You will auto receive the new patch update KB4530684 on your respective Windows 10 version 19H1 through Windows Update. Additionally, you may download the patch update manually as well by visiting the following address –

Settings (using Win+I) > Update & Security > Windows Update

After you reach the above path, press the Check for Updates button.

2. Through the Update Catalog

Download the Standalone Package for Windows 10 version: 1903 & 1909

3. Via Windows Server Update Services (WSUS)

If you configure Products and Classifications as described below, KB4530684 will auto-synchronize with WSUS.

  • Product: Windows 10
  • Classification: Security Updates

Source – Microsoft Update Catalog