Windows Server, version 20H2 Build 19042.1466

January 11, 2022 - KB5009543 (OS Builds 19042.1466, 19043.1466, and 19044.1466)
Windows 10, version 2004, all editions Windows Server version 2004 Windows 10, version 20H2, all editions Windows Server, version 20H2, all editions Windows 10, version 21H1, all editions

Highlights
- Updates a known issue that affects Japanese Input Method Editors (IME). Text you enter might appear out of order or the text cursor might move unexpectedly in apps that use the multibyte character set (MBCS).
- Updates security for your Windows operating system.
Improvements and fixes
This security update includes quality improvements. Key changes include:
- Addresses a known issue that affects Japanese Input Method Editors (IME). When you use a Japanese IME to enter text, the text might appear out of order or the text cursor might move unexpectedly in apps that use the multibyte character set (MBCS). This issue affects the Microsoft Japanese IME and third-party Japanese IMEs.
Windows 10 servicing stack update - 19042.1371, 19043.1371, and 19044.1371
- This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates (SSU) ensure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates.





Windows Server, version 2004is a Semi-Annual Channel (SAC) Release. In our most recent Windows Server SAC releases, we've optimized for containers. In this release, we continued improving fundamentals for the core container platform such as performance and reliability. We've also worked with .NET team and PowerShell team and further optimized image size and performance for Server Core containers. We will share more details below. On container networking side, we implemented several improvements to allow for better scalability, robustness, and reliability. One example is additional changes and improvements to Direct Server Return (DSR).

Windows Server, version 20H2 is the next Semi-Annual Channel release of Windows Server, version 2004. This version focuses on reliability, performance, and other general improvements, but has no new features. Like other Semi-Annual Channel releases, it's supported for 18 months after its release.

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