March 22, 2018—KB4088883 (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 KB4088877 (released March 13, 2018) and also includes these new quality improvements as a preview of the next Monthly Rollup update:

  • Addresses an issue that affects Spell Checker and custom dictionaries.

  • Addresses an issue that decreases the Universal CRT’s performance in the _gcvt and _gcvt_s functions.
  • Addresses an issue in which the output to a file or pipe was fully buffered in the Universal CRT for the standard error (STDERR) stream.
  • Addresses an issue in the Universal CRT by adding the "x" access mode flag to support the fopen() function.
  • Addresses an issue in which a race condition in the Universal C Runtime (CRT) occurs when you update the global locale. The issue corrupts the current locale reference count and triggers a double free condition.

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

Known issues in this update


Symptom Workaround
Because of an issue that affects some versions of antivirus software, this fix applies only to computers on which the antivirus ISV updated the ALLOW REGKEY.

This issue is resolved in KB4093116. You no longer need the following ALLOW REGKEY to detect and be offered this update: 

HKEY_LOCAL_MACHINE"Subkey="SOFTWARE\Microsoft\Windows\CurrentVersion\QualityCompat\cadca5fe-87d3-4b96-b7fb-a231484277cc

A stop error occurs at restart on computers that support the Unified Extensible Firmware Interface (UEFI). Install the latest Windows Updates.

 

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 4088883