October 17, 2017—KB4041685 (Preview of Monthly Rollup)

Improvements and fixes

This non-security update includes improvements and fixes that were a part of KB4041693 (released October 10, 2017) and also includes these new quality improvements as a preview of the next Monthly Rollup update:

• Addressed memory leak issue in combase that occurs while converting Rich Text to Unicode.

• Addressed issue in which using smart card authentication to connect RDP to the Windows 2012 RDS server fails intermittently. The issue is related to a timing problem in the LogonUI process. It is most common when clients use virtual smart cards.

• Addressed issue that affects the Universal CRT in which _stat32i64() returns an incorrect drive number (error 0xFFFFFFFF) when using a relative path.

• Addressed issue in the Universal CRT in which incorrect characters were returned when the tolower() function was called.

• Addressed issue in which the Universal CRT _splitpath() function was not handling multibyte strings correctly. This caused apps to fail when accessing multibyte filenames.

• Addressed issue in which the Universal CRT caused linker (link.exe) to stop working for large projects.

• Addressed issue in which the MSMQ performance counter (MSMQ Queue) may not populate queue instances when the server hosts a clustered MSMQ role.

• Addressed issue in which AD FS can no longer ignore "prompt=login" during authentication. A "Disabled" option was added to support scenarios in which password authentication is not used. For more information, see AD FS ignores the "prompt=login" parameter during an authentication in Windows Server 2012 R2.

• Addressed issue in AD FS in which MSISCookies in request headers could eventually overflow the headers size limit. This caused a failure to authenticate and return HTTP status code 400: “Bad Request - Header Too Long."

• Addressed issue in which adding user rights to an RMS template caused the Active Directory RMS management console (mmc.exe) to stop working and return an unexpected exception.

• Addressed issue in which USBHUB.SYS randomly caused memory corruption that caused random system crashes that are extremely difficult to diagnose.

• Added support for LTO8 tape drives into ltotape.sys for Windows Server 2012 R2.

• Addressed issue where Miniports that make 64-bit DMA requests from a single 4 GB region may fail, preventing the system from booting.

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

Known issues in 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 stand-alone 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 4041685.

Prerequisites

You must have the following update installed:

2919355 Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 update: April 2014