KB5075904: February 10, 2026 Security Update for Windows Server 2019 and Windows 10 LTSC 2019 (OS Build 17763.8389)

Summary

KB5075904 is a security update for Windows Server 2019 and Windows 10 Enterprise LTSC 2019, producing OS Build 17763.8389. Released on February 10, 2026, it is a Patch Tuesday cumulative update that rolls in fixes first delivered in the January 13, January 17, and January 24, 2026 updates. Full details are available from Microsoft Support.

Highlights

• Chinese font updates to meet GB18030-2022A compliance requirements.
• A fix for Secure Launch-capable devices with Virtual Secure Mode enabled that restarted instead of shutting down or hibernating after the January 13, 2026 security update.
• A fix for custom folder names in File Explorer being ignored when set through the LocalizedResourceName key in desktop.ini files.
• A stability fix for certain GPU configurations.

Improvements and fixes

• Fonts: Chinese fonts have been updated to satisfy GB18030-2022A compliance requirements.
• OS Security (known issue resolution): On Secure Launch-capable PCs with Virtual Secure Mode (VSM) enabled, a defect introduced by the January 13, 2026 security update caused devices to restart rather than shut down or enter hibernation. This update corrects that behavior.
• Folders: File Explorer was ignoring the LocalizedResourceName setting in desktop.ini files during folder rename operations, preventing custom folder display names from appearing. Custom names now render as expected.
• Graphics: A stability problem affecting certain GPU configurations has been resolved.
• Servicing stack: This update bundles the latest servicing stack update (KB5075903, version 17763.8381) to improve the reliability of future update installations.

Known issues

Japanese characters fail to render correctly in PowerShell

Symptom: On Japanese-language installations of Windows Server 2019, installing this update (released on or after January 13, 2026) may cause Japanese characters to display incorrectly in the PowerShell console. An unintended change incorrectly sets PowerShell encoding to UTF-8 after the update installs. English text and command entry continue to work normally, but Japanese output appears garbled or as question marks. Japanese text entered into PowerShell is affected in the same way.

Workaround: This issue is resolved in Windows updates released on and after April 14, 2026, such as KB5082123. Microsoft recommends installing the latest available Windows update, which contains this fix along with other improvements.

Note for Windows 10 Enterprise LTSC 2019: Microsoft states no known issues for that edition of this update at the time of writing.

How to get this update

Prerequisite: You must have installed the August 10, 2021 SSU (KB5005112) before applying this cumulative update.

The update is available through the following channels:

• Windows Update: Downloaded and installed automatically.
• Windows Update for Business: Delivered automatically in accordance with your configured policies.
• Microsoft Update Catalog: The standalone package can be downloaded directly from the Microsoft Update Catalog website.
• Windows Server Update Services (WSUS): Syncs automatically when Products and Classifications are configured as follows - Product: Windows 10 LTSB, Windows Server 2019; Classification: Security Updates.

To remove only the LCU component after installation, use the DISM /Remove-Package command with the LCU package name as the argument. Running wusa.exe /uninstall against the combined SSU+LCU package will not work, and the SSU cannot be removed from the system once installed.

Frequently asked questions

Does this update affect Secure Boot certificate renewal?

Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been pushing updated certificates to consumer and non-managed business devices for several months. Devices that have not yet received the new certificates will continue to start and operate normally, and standard Windows updates will continue to install while the rollout continues.

Will this update also install Microsoft Store app updates?

No. Windows updates do not install Microsoft Store application updates. Enterprise users should refer to the Microsoft Store apps - Configuration Manager documentation, while consumer users should use the Get updates for apps and games in Microsoft Store guidance to update Store applications separately.

When does support end for Windows Server 2019 and Windows 10 Enterprise LTSC 2019?

Both products share the same end-of-support date: January 9, 2029. After that date, Microsoft will no longer provide free software updates through Windows Update, technical assistance, or security fixes. Microsoft recommends planning an upgrade to a later version of Windows Server before that deadline.

How do I uninstall just the LCU portion of this update?

Because the SSU and LCU are delivered as a combined package, running wusa.exe /uninstall will not work. To remove only the LCU, use DISM /online /remove-package and supply the LCU package name as the argument. You can retrieve the package name first by running DISM /online /get-packages. Note that the SSU component cannot be removed once it is installed.