May 9, 2017—KB4016871 (OS Build 15063.296 and 15063.297)

Improvements and fixes

This security update includes quality improvements. No new operating system features are being introduced in this update. Key changes include:

• Addressed issue with Surface Hub devices waking from sleep approximately every four minutes after the first two hours.
• Addressed issue where autochk.exe can randomly skip drive checks and not fix corruptions, which may lead to data loss.
• Addressed an issue where Microsoft Edge users in networking environments that do not fully support the TCP Fast Open standard may have problems connecting to some websites. Users can re-enable TCP Fast Open in about:flags.
• Addressed issues with Arc Touch mouse Bluetooth connectivity.
• Security updates to Microsoft Edge, Internet Explorer, Microsoft Graphics Component, Windows SMB Server, Windows COM, Microsoft Scripting Engine, Windows kernel, Windows Server, and the .NET Framework.
  If you installed earlier updates, only the new fixes contained in this package will be downloaded and installed on your device.

Known issues in this update

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

How to get 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. After this update is installed, the build number will be either 15063.296 (for all Windows 10 devices except Mobile and IoT) or 15063.297 (for Mobile and IoT).

• Update replacement information
  This update replaces the previously released update KB4016240.
• File information
  For a list of the files that are provided in this update, download the file information for cumulative update KB4016871.