This security update includes quality improvements. Key changes include:
Symptom | Workaround |
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After installing this update, there may be issues using the Preboot Execution Environment (PXE) to start a device from a Windows Deployment Services (WDS) server configured to use Variable Window Extension. This may cause the connection to the WDS server to terminate prematurely while downloading the image. This issue does not affect clients or devices that are not using Variable Window Extension. | This issue is resolved KB4503263. |
Microsoft and Sophos have identified an issue on devices with Sophos Endpoint Protection installed and managed by either Sophos Central or Sophos Enterprise Console (SEC) that may cause the system to become unresponsive upon restart after installing this update. | This issue has been resolved. Microsoft has removed the temporary block for all affected Windows updates.Guidance for Sophos Endpoint and Sophos Enterprise Console customers can be found in the Sophos support article. |
Microsoft and Avira have identified an issue on devices with Avira antivirus software installed that may cause the system to become unresponsive upon restart after installing this update. | This issue has been resolved. Microsoft has removed the temporary block for all affected Windows updates. Avira has released an automatic update to address this issue. Guidance for Avira customers can be found in the Avira support article. |
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: |
This update is now available for installation through WSUS. To get the standalone package for this update, go to the Microsoft Update Catalog website.File informationFor a list of the files that are provided in this update, download the file information for update 4493450.