September 19, 2017—KB4038797 (Preview of Monthly Rollup)

Applies to: Windows Server 2012Windows Embedded 8 Standard

Improvements and fixes


This non-security update includes improvements and fixes that were a part of KB4038799 (released September 12, 2017) and also includes these new quality improvements as a preview of the next Monthly Rollup update:

  • Addressed issue where the CloseHandle() API to the COM port never returns, causing the application thread to stop responding.

  • Addressed issue where a service using a Managed Service Account (MSA) fails to connect to the domain after an automatic password update.

  • Addressed issue where some Remote Desktop users fail to log on to a Remote Desktop Server and encounter a black screen instead.

  • Addressed issue where a WMI handle leak may cause a system error when using the Unified Write Filter. The error code is “PAGE_FAULT_IN_NONPAGED_AREA (uwfreg.sys) 0x50”.

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

Known issues in this update


 Microsoft is not currently aware of any issues with this update.

How to get this update


This is provided as an Optional update on Windows Update. For more information about how to run Windows Update, see How to get an update through Windows Update. To get the standalone package for this update, go to the Microsoft Update Catalog website.

File information

For a list of the files that are provided in this update, download the file information for update 4038797.