KB4512478 Preview of Monthly Quality Rollup Update for Windows 8.1 - Aug. 17

August 17, 2019 - KB4512478 (Preview of Monthly Rollup)

Applies to: Windows 8.1, Windows Server 2012 R2


Improvements and fixes

This non-security update includes improvements and fixes that were a part of KB4512488 (released August 13, 2019) and also includes these new quality improvements as a preview of the next Monthly Rollup update:

• Addresses an issue in which the memory usage of LSASS continues to grow until it is necessary to restart the system.
• Addresses an issue that may cause rdpdr.sys to stop responding or stop working (0x18, 0x50, 0xa, 0x27, 0x133). This issue occurs when Remote Desktop Protocol (RDP) clients use a redirected drive on the local system.
• Addresses an issue that may prevent devices from starting when they start up using Preboot Execution Environment (PXE) images from Windows Deployment Services (WDS) or System Center Configuration Manager (SCCM). The error is, "Status: 0xc0000001, Info: A required device isn't connected or can't be accessed."

Known issues in this update

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.

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 - KB4512478 Microsoft Update Catalog

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