April 25, 2019—KB4498375 (OS Build 10240.18187)

Applies to: Windows 10

Improvements and fixes

This update includes quality improvements.  Key changes include:

  • Addresses an issue that prevents an input method editor (IME) from supporting the new Japanese Era character.
  • Updates the NLS registry to support the new Japanese Era.

  • Addresses an issue that causes the DateTimePicker to display the date incorrectly in the Japanese date format.
  • Addresses an issue that causes the Date and Time Settings control to cache old Eras and prevents the control from refreshing when the time enters the new Japanese Era. 

  • Updates fonts to support the new Japanese Era.  

For more information about the new Japanese Era, see KB4469068.

    If you installed earlier updates, only the new fixes contained in this package will be downloaded and installed on your device.

      Known issues in this update

      Symptom Workaround
      Certain operations, such as rename, that you perform on files or folders that are on a Cluster Shared Volume (CSV) may fail with the error, “STATUS_BAD_IMPERSONATION_LEVEL (0xC00000A5)”. This occurs when you perform the operation on a CSV owner node from a process that doesn’t have administrator privilege.

      Do one of the following:

      • Perform the operation from a process that has administrator privilege.
      • Perform the operation from a node that doesn’t have CSV ownership.
      Microsoft is working on a resolution and will provide an update in an upcoming release.


      How to get this update

      Before installing this update

      Microsoft strongly recommends that you install the latest servicing stack update (SSU) for your operating system before installing the latest cumulative update (LCU). SSUs improve the reliability of the update process to mitigate potential issues while installing the LCU and applying Microsoft security fixes. For more information, see Servicing stack updates.

      If you are using Windows Update, the latest SSU (KB4093430) will be offered to you automatically. To get the standalone package for the latest SSU, search for it in the Microsoft Update Catalog.

      Install this 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 cumulative update 4498375