August 13, 2019—KB4512486 (Security-only update)

Applies to: Windows 7 Service Pack 1Windows Server 2008 R2 Service Pack 1

Improvements and fixes


This security update includes quality improvements. Key changes include:

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

IA64 devices (in any configuration) and x64 devices using EFI boot that were provisioned after the July 9th updates and/or skipped the recommended update (KB3133977), may fail to start with the following error:

"File: \Windows\system32\winload.efi

Status: 0xc0000428

Info: Windows cannot verify the digital signature for this file."

To resolve this issue please follow the steps outlined in the SHA-2 support FAQ article for error code 0xc0000428.

Microsoft and Symantec have identified an issue that occurs when a device is running any Symantec or Norton antivirus program and installs updates for Windows that are signed with SHA-2 certificates only. The Windows updates are blocked or deleted by the antivirus program during installation, which may then cause Windows to stop working or fail to start.

Microsoft has temporarily placed a safeguard hold on devices with an affected version of Symantec Antivirus or Norton Antivirus installed to prevent them from receiving this type of Windows update until a solution is available. We recommend that you do not manually install affected updates until a solution is available.

Guidance for Symantec customers can be found in the Symantec support article.
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." This issue is resolved in KB4517297, which is an optional update. It is now available on Microsoft Update Catalog and Windows Server Update Services (WSUS).

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 (KB4490628) will be offered to you automatically. To get the standalone package for the latest SSU, search for it in the Microsoft Update Catalog

Prerequisite: The SHA-2 update (KB4474419) must be installed before installing this update. For more information on SHA-2 updates, see 2019 SHA-2 Code Signing Support requirement for Windows and WSUS.

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 7 Service Pack 1, Windows Server 2008 R2 Service Pack 1

Classification: Security Updates

 

File information

For a list of the files that are provided in this update, download the file information for update 4512486