August 13, 2019—KB4512489 (Security-only update)

Applies to: Windows 8.1Windows Server 2012 R2

Improvements and fixes


This security update includes quality improvements. Key changes include:

  • Security updates to Windows App Platform and Frameworks, Windows Input and Composition, Windows Wireless Networking, Windows Virtualization, Windows Datacenter Networking, Windows Storage and Filesystems, the Microsoft JET Database Engine, Windows MSXML, and Windows Server.

For more information about the resolved security vulnerabilities, please refer to the Security Update Guide.

Known issues in this update


Symptom

Workaround

Certain operations, such as rename, that you perform on files or folders that are on a Cluster Shared Volume (CSV) may fail with the error, “STATUS_BAD_IMPERSONATION_LEVEL (0xC00000A5)”. This occurs when you perform the operation on a CSV owner node from a process that doesn’t have administrator privilege.

Do one of the following:

  • Perform the operation from a process that has administrator privilege.
  • Perform the operation from a node that doesn’t have CSV ownership.
Microsoft is working on a resolution and will provide an update in an upcoming release.
Devices that start up using Preboot Execution Environment (PXE) images from Windows Deployment Services (WDS) or System Center Configuration Manager (SCCM) may fail to start with the error "Status: 0xc0000001, Info: A required device isn't connected or can't be accessed" after installing this update on a WDS server.

For mitigation instructions, see KB4512816.

We are working on a resolution and will provide an update in an upcoming release.

After installing this update, applications that were made using Visual Basic 6 (VB6), macros using Visual Basic for Applications (VBA), and scripts or apps using Visual Basic Scripting Edition (VBScript) may stop responding and you may receive an "invalid procedure call error." Microsoft is presently investigating this issue and will provide an update when available.

How to get this update


Before installing this update

Microsoft strongly recommends you install the latest servicing stack update (SSU) for your operating system before installing the latest Rollup. SSUs improve the reliability of the update process to mitigate potential issues while installing the Rollup and applying Microsoft security fixes. 

If you are using Windows Update, the latest SSU (KB4504418) will be offered to you automatically. To get the standalone package for the latest SSU, search for it in the Microsoft Update Catalog.  

Install this update

Release Channel Available Next Step
Windows Update and Microsoft Update No See the other options below.
Microsoft Update Catalog Yes To get the standalone package for this update, go to the Microsoft Update Catalog.
Windows Server Update Services (WSUS) Yes

This update will automatically synchronize with WSUS if you configure Products and Classifications as follows:

Product: Windows 8.1, Windows Server 2012 R2

Classification: Security Updates

 

File information

For a list of the files that are provided in this update, download the file information for update 4512489