This security update includes improvements and fixes that were a part of update KB4489920 (released March 19, 2019) and addresses the following issues:
- Addresses an issue that causes the error "0x3B_c0000005_win32k!vSetPointer" when the kernel mode driver, win32k.sys, accesses an invalid memory location.
- Addresses an issue that may cause applications that use MSXML6 to stop responding if an exception was thrown during node operations.
- Addresses an issue that causes the Group Policy editor to stop responding when editing a Group Policy Object (GPO) that contains Group Policy Preferences (GPP) for Internet Explorer 10 Internet settings.
- Addresses an issue that may cause authentication issues for Internet Explorer 10 and other applications that use WININET.DLL. This occurs when two or more people use the same user account for multiple, concurrent login sessions on the same Windows Server machine, including Remote Desktop Protocol (RDP) and Terminal Server logons.
- Addresses an issue that may prevent Custom URI Schemes for Application Protocol handlers from starting the corresponding application for local intranet and trusted sites on Internet Explorer.
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Addresses an issue that may cause compound document (OLE) server applications to display embedded objects incorrectly if you use the PatBlt API to place embedded objects into the Windows Metafile (WMF).
- Security updates to Windows Storage and Filesystems, Windows Server, Microsoft Graphics Component, Windows Input and Composition, Windows Datacenter Networking, Windows Kernel, Windows MSXML, and the Microsoft JET Database Engine.
For more information about the resolved security vulnerabilities, please refer to the Security Update Guide.