October 17, 2017—KB4041692 (Preview of Monthly Rollup)

Improvements and fixes

This non-security update includes improvements and fixes that were a part of KB4041690(released October 10, 2017) and also includes these new quality improvements as a preview of the next Monthly Rollup update:

• Addressed issue with the Universal CRT where _stat32i64() returns an incorrect drive number (error 0xFFFFFFFF) when using a relative path.

• Addressed issue in the Universal CRT where incorrect characters are returned when the tolower() function is called.

• Addressed issue where the Universal CRT _splitpath() function wasn't handling multibyte strings correctly, which caused apps to fail when accessing multibyte filenames.

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

• Addressed issue where USBHUB.SYS randomly causes memory corruption that results in random system crashes that are extremely difficult to diagnose.

For more information about the resolved security vulnerabilities, please refer to 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 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 4041692.