Note: This release also includes updates for Microsoft HoloLens (OS Build 17763.316), which was released on February 12, 2019.

Microsoft will release an update directly to the Windows Update Client to improve the reliability of Windows Update on Microsoft HoloLens devices that have not yet updated to this most recent OS Build.

Improvements and fixes

This update includes quality improvements without introducing any new operating system features. Key changes are as follows:

• Resolves an issue that prevents the correct setting of the LmCompatibilityLevel value, which specifies the authentication mode and session security.
• Fixes an issue that may prevent applications using a Microsoft Jet database with the Microsoft Access 97 file format from opening if the database has column names greater than 32 characters, causing the error “Unrecognized Database Format.”
• Addresses an issue where Microsoft Edge fails to load webpages using a local IP address or a VPN connection.
• Fixes an issue that causes Windows Hello for Business Hybrid Key Trust deployment sign-in to fail if Windows 2019 Server domain controllers are used for authentication, with the error message “That option is temporarily unavailable. For now, please use a different method to sign in.” If Active Directory activity tracing is enabled, a Local Security Authority Subsystem Service (LSASS) exception may occur when processing a user’s sign-in.
  • Note: Active Directory Data Collector Set and Microsoft Azure Advanced Threat Protection (AATP) enable Active Directory activity tracing by default.
• Resolves an issue in Microsoft HoloLens that allows users to bypass the lock screen sign-in process in certain workflows.

Additionally, security updates are provided for Microsoft Scripting Engine, Microsoft Edge, Windows Server, Microsoft JET Database Engine, Internet Explorer, Windows Wireless Networking, Windows Storage and Filesystems, Windows Input and Composition, Windows Graphics, and Windows App Platform and Frameworks.

If earlier updates have been installed, only the new fixes in this package will be downloaded and installed.

For more details about the resolved security vulnerabilities in this update, please refer to the Security Update Guide. This resource provides comprehensive information about the security fixes, affected components, and the severity of each vulnerability.

Known issues in this update

Symptom	Workaround
After installing this update, the first character of the Japanese era name is not recognized as an abbreviation, which may cause date parsing issues.	Modify the registry with the two-character abbreviation for Japanese eras as follows: [HKEY_LOCAL_MACHINE \SYSTEM \CurrentControlSet \Control\Nls \Calendars\Japanese\Eras] “1868 01 01″=”明治_明_Meiji_M” “1912 07 30″=”大正_大_Taisho_T” “1926 12 25″=”昭和_昭_Showa_S” “1989 01 08″=”平成_平_Heisei_H” Microsoft is working on a resolution and will provide an update in an upcoming release.