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This security update includes improvements and fixes in the functionality of Windows 10. It also resolves the following vulnerabilities in Windows:

  • 3193229 MS16-125: Security update for diagnostics hub: October 11, 2016

  • 3193227 MS16-124: Security update for Windows registry: October 11, 2016

  • 3192892 MS16-123: Security update for kernel-mode drivers: October 11, 2016

  • 3195360 MS16-122: Security update for Microsoft video control: October 11, 2016

  • 3192884 MS16-120: Security update for Microsoft graphics component: October 11, 2016

  • 3192890 MS16-119: Cumulative security update for Microsoft Edge: October 11, 2016

  • 3192887 MS16-118: Cumulative security update for Internet Explorer: October 11, 2016

  • 3178465 MS16-101: Security update for Windows authentication methods: August 9, 2016

Windows 10 updates are cumulative. Therefore, this package contains all previously released fixes.

If you have installed previous updates, only the new fixes that are contained in this package will be downloaded and installed to your computer. If you are installing a Windows 10 update package for the first time, the package for the x86 version is 466 MB and the package for the x64 version is 1,034 MB.

Improvements and fixes

Known issues that are resolved by this update

This update resolves known issues that are caused by security update 3170005. For more information about the known issues, see the
Oct 2016 Update: Mitigation for known issues section in KB 3170005.

Known issues in this security update

Issue 1


After you install this security update, System Center Operations Manager (SCOM) Management Console crashes in State view.

To resolve this issue, install the following update:

3199125 Cumulative Update for Windows 10 RTM: October 18, 2016

Issue 2


After you install this security update, some DFS-N mapped network drives may be inaccessible to members of the Administrators group when UAC and EnableLinkedConnections are enabled. This occurs when the process that is attempting to access the mapped network drive, is running in a different elevation status than the process that created the mapped network drive. For example, an Explorer window, that is an unelevated process, is unable to access a mapped drive created by a logon script, that runs in an elevated context.

To resolve this issue, install this update KB4012606.

How to get this update

Method 1: Windows Update

This update will be downloaded and installed automatically.

Method 2: Microsoft Update Catalog

To get the stand-alone package for this update, go to the Microsoft Update Catalog website.


There are no prerequisites for installing this update.

Restart information

You must restart the computer after you apply this update.

Update replacement information

This update replaces the previously released updates 3185611 and 3193821.

File Information

For a list of the files that are provided in this cumulative update, download the file information for cumulative update 3192440.


Learn about the terminology that Microsoft uses to describe software updates.

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