March 13, 2018 - KB4088879 (Security-only update)
Applies to: Windows 8.1, Windows Server 2012 R2 Standard
Improvements and fixes
This security update includes quality improvements. No new operating system features are being introduced in this update. Key changes include:
- Addresses issue where customers sometimes can't sign in to Windows 2012 R2 servers when using a custom credential provider on a console or RDP.
- Provides cumulative Spectre and Meltdown protections for 32-Bit (x86) and 64-Bit (x64) versions of Windows except the KB4078130 update that was offered to disable mitigation against Spectre Variant 2.
- Security updates to the Microsoft Graphics component, Windows Kernel, Windows Shell, Windows MSXML, Windows Installer, and Windows Hyper-V.
For more information about the resolved security vulnerabilities, see the
Security Update Guide.
Known issues in this update
Symptom
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Workaround
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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.
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Contact your antivirus manufacturer to verify that their software is compatible and that they have set the following REGKEY on the computer:
Key="HKEY_LOCAL_MACHINE"Subkey="SOFTWARE\Microsoft\Windows\CurrentVersion\QualityCompat"
Value Name="cadca5fe-87d3-4b96-b7fb-a231484277cc"
Type="REG_DWORD”
Data="0x00000000”
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How to get this update
This update is now available for installation through WSUS. 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 4088879.
Download KB4088879 MSU for Windows 8.1 32-bit (x86) - 18.7 MB