KB4519978 updates Windows 10 1803 to Build 17134.1099 – 15 Oct 2019

Microsoft rolls another new cumulative update KB4519978 that brings non-security patches for Windows 10 1803 users. This Tuesday patch upgrades the existing OS to build 17134.1099 along with new fixes and improvements. The Company has improved the error code “0x7E”, error SYSTEM_THREAD_EXCEPTION_NOT_HANDLED (7e) related to the ReFS, and a few others. The team has also pushed out a few known issues which they promised to work upon them in the forthcoming days.

Users can get the KB4519978 by checking for updates under the Windows Update section. They can also install the patch by downloading offline installers. The company rectifies a long-time occurring error which reduces CPU utilization along with improving MSCTF.dll components and compatibility issues of Ecosystems. Further, here is the complete list of Windows 10 cumulative updates.


General changes and Improvements 

  • KB4519978 addresses a bug that causes printing from 32-bit applications to fail on the following error – “Access is denied”. This appears when you select Run as a different user for the concerned application. 
  • Resolves an anomaly that sometimes causes the Resilient File System (ReFS) to stop working. 
  • Improves the compatibility status of the Windows ecosystem so as to make different apps compatible with upcoming updates to Windows.
  • Build 17134.1099 addresses an issue with a race condition between the volume mount process (within fileinfo.sys) and the deregistration of filter notifications that cause the operating system to stop working on certain virtual machines. The error code is “0x7E.”
  • Resolves the underlying cause that results in your device entering into Windows out of Box Experience i.e. OOBE. If your system ever enters in such situations, it will stick into a restart loop.
  • Updates the time zone information of countries like- Australia, Fiji Islands, and Norfolk Island. 
  • KB4519978 works upon an issue that may restrict that scroll bar from being selected when an ActiveX control implements the CScrollView class. This bug appears if you move the Internet Explorer window, which then moves the scroll bar to the left. 
  • Improves the MSCTF.dll component so that it doesn’t stop any application from working.
  • Enhances the access control list (ACL) check for Known Folders so as to prevent a black screen that may appear the very first time a user signs in after installing the following patch update. 
  • Resolves a pending issue on Bluetooth owing to which one can’t use certain audio profiles for extended periods. 
  • Rectifies trouble that fails to include the full file hash as part of the Event Log entry during auditing events for Windows Defender Application Control (WDAC). 
  • Build 17134.1099 removes the issue due to which Microsoft AppLocker restricts an application from running. The app rather logs a false positive error instead of running the application. 
  • Works upon an anomaly that results in “SYSTEM_THREAD_EXCEPTION_NOT_HANDLED (7e)” stop error code. The above message appears while performing a Windows update using Transmission Control Protocol/Internet Protocol (TCPIP). 
  • Resolves a bug that causes the WDAC policy to become too restrictive when you enable the WDAC Group Policy setting for Script Enforcement or Constrained Language Mode. 
  • Works upon an issue that restricts netdom.exe from displaying the new ticket-granting ticket (TGT) delegation bit for the display or query mode. 
  • Improves the Resilient File System (ReFS) issue, hence this may function as supposed to be.
  • It rectifies an issue that may result in high CPU usage while several windows are running in the background. Moreover, this occurs even when the Background Application Manager performs a periodic background scan. The desktop may become unresponsive; to turn off this scan, set the following registry key as follows-

Name: DisableWindowHinting


Value: 1 

Known Issues on KB4519978


Symptom Workaround

While performing certain operations like renaming of files and folders, the following error message may prompt instantly –


This bug appears when you don’t have administrative rights yet you perform these actions on a Cluster Shared Volume.

To resolve this bug, perform the operation using-

  • A procedure that has admin rights.
  • A node not requiring CSV ownership.

The Company may release a permanent solution to this very soon as they are currently working on a resolution.

After installing this cumulative update, some users may receive a “15-5” error message while using Windows Mixed Reality Portal.

In a few situations, Windows Mixed Reality Portal may report that the headset is either sleeping or pressing “Wake up”.

To resolve the issue, use the following steps:

  1. Close the Windows Mixed Reality Portal, if it is indeed running.
  2. Next, launch Task Manager; you may use the Ctrl+Alt+Del keys combination as well.
  3. In Task Manager, head over to the Processes tab, right-click Windows Explorer and select Restart.
  4. Now, you may start the Windows Mixed Reality Portal.

The team is working on a resolution and might provide the same in an upcoming release.


How to get KB4519978 patch 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 KB4519978 on your respective Windows 10 1803 series PCs through Windows Update. Besides, you can manually download the patch update as well by visiting the following address-

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

After you reach the above location, press Check for updates option.

2. Through the Update Catalog

Download the Standalone Package for Windows 10 version: 1803.

3. Via Windows Server Update Services (WSUS)

If you configure Products and Classifications as described below, KB4519978 will auto-synchronize with WSUS.

  • Product: Windows 10
  • Classification: Security Updates

Source: Microsoft Update Catalog