May 9, 2017—KB4019216 (Monthly Rollup)

This security update includes improvements and fixes that were a part of update KB4015554 (released April 18, 2017), and also resolves the following vulnerabilities in Windows:

• Addressed issue in which, after you install security update 4015551, applications that use msado15.dll stop working.
• Addressed issue in which, after you install KB3187754, clients can no longer access a file server when using SMB1 and NTLM authentication under certain conditions. No credentials dialog box appears, and the user receives an “A specified logon session does not exist. It may already have been terminated” error message. 
• Security updates to Microsoft Graphics Component, Windows COM, Windows Server, Windows Kernel, Internet Explorer, and Microsoft Windows DNS.

For more information about the security vulnerabilities resolved, please refer to the Security Update Guide.

Microsoft is not currently aware of any issues with this update.

This update will be downloaded and installed automatically from Windows Update. To get the stand-alone package for this update, go to the Microsoft Update Catalog website.

• File information
  For a list of the files that are provided in this update, download the file information for update KB4019216.