This security update includes improvements and fixes that were a part of update KB4088882 (released March 22, 2018) and addresses the following issues:
- Windows Update and WSUS will offer this update to applicable Windows client and server operating systems regardless of the existence or value of the "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\QualityCompat\cadca5fe-87d3-4b96-b7fb-a231484277cc" registry setting. This change has been made to protect user data.
- Addresses an issue with printing content generated by ActiveX in Internet Explorer.
- Addresses an access violation on certain pages in Internet Explorer when it's rendering SVGs under high load.
- Addresses an issue that, in some instances, prevents Internet Explorer from identifying custom controls.
- Security updates to Internet Explorer, Microsoft scripting engine, Microsoft graphics component, Windows Server, Windows kernel, Windows datacenter networking, Windows Hyper-V, Windows virtualization and kernel, and Windows app platform and frameworks.
For more information about the resolved security vulnerabilities, see the Security Update Guide.