Update for Windows Server 2012 and Windows Embedded 8 Standard: June 21, 2019

Applies to: Windows Server 2012Windows Embedded 8 Standard


This update for Windows Server 2012 and Windows Embedded 8 Standard includes the quality improvements from KB4503263 (released June 11, 2019), in addition to these key changes:

  • Addresses an issue that may display the error, “MMC has detected an error in a snap-in and will unload it.” when you try to expand, view, or create Custom Views in Event Viewer. Additionally, the application may stop responding or close. You may also receive the same error when using Filter Current Log in the Action menu with built-in views or logs.
  • Addresses an issue that may prevent some devices and generation 2 Hyper-V virtual machines (VMs) from installing an update when Secure Boot is enabled.

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 and install the update

To get the standalone package for this update, go to the Microsoft Update Catalog website.

More information


There are no prerequisites for installing this update on other platforms.

Update replacement information

This update doesn't replace a previously released update.

Note This update contains all the quality and security changes in KB4503263. While it does not replace KB4503263 on Windows Update, if you install this update you do not need to install KB4503263.


Learn about the terminology that Microsoft uses to describe software updates.