October 17, 2017—KB4035176 Improvements and Fixes to Universal C Runtime in Windows

This non-security update includes quality improvements. No new operating system features are being introduced in this update. Key changes include:

• 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 were returned when the tolower() function was called.8.1
• Addressed issue where the Universal CRT _splitpath() function was not 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.

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.