March 20, 2017—KB4015438 (OS Build 14393.969)

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

• Addressed a known issue with KB4013429 that caused Windows DVD Player (and 3^rd party apps that use Microsoft MPEG-2 handling libraries) to crash.
• Addressed issue where some customers who have Switch Embedded Teaming (SET) enabled might experience a deadlock or error when changing the physical adapter’s link speed property. This is a known issue in KB4013429. This issue is most commonly seen as a DPC_WATCHDOG_VIOLATION or when verifier is enabled a VRF_STACKPTR_ERROR is seen in the Memory dump.

If you installed earlier updates, only the new fixes contained in this package will be downloaded and installed on your device.

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

• Update replacement information
  This update replaces the previously released update KB4013429.
• File information
  For a list of the files that are provided in this update, download the file information for cumulative update KB4015438. If you're installing a Windows 10 update for the first time, the package size for the X86 version is 566 MB and the package size for the x64 version is 1,106 MB.