This update includes quality improvements. Key changes include:
Addresses an issue that may prevent access to some gov.uk websites that don’t support HTTP Strict Transport Security (HSTS) when using Internet Explorer 11 or Microsoft Edge.
Addresses an issue in which installation may fail with the error, "0x800f081f - CBS_E_SOURCE_MISSING."
Note: After installation, the OS build will be 18362.116.
Known issues in this update
After installing this update, users may experience error “0x800705b4” when launching Windows Defender Application Guard or Windows Sandbox.
Use the credentials of a local admin to create and set the following registry keys on the Host OS then restart the Host:
Windows Sandbox may fail to start with "ERROR_FILE_NOT_FOUND (0x80070002)" on devices in which the operating system language is changed during the update process when installing Windows 10, version 1903.
This issue is resolved in KB4512941.
How to get this update
Before installing this update
Microsoft strongly recommends 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.
Install this update
This update will be downloaded and installed automatically from Windows Update. To get the standalone package for this update, go to the Microsoft Update Catalog website.
For a list of the files that are provided in this update, download the file information for cumulative update 4505057.
There are no prerequisites for installing this update.
You will have to restart your computer after you apply this update.
Update replacement information
This update replaces the previously released update 4497936.
Learn about the terminology that Microsoft uses to describe software updates.