Cumulative update for Windows 10: September 20, 2016


We encountered a network transmission issue that affected update 3185611, published on September 13, 2016. The quickest way to address this issue was to reissue the update to all Content Delivery Networks. This new update package, KB3193821, includes the same set of fixes as KB3185611. We apologize for any inconvenience this may have caused.

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

  • 3183038 MS16-104: Cumulative security update for Internet Explorer: September 13, 2016

  • 3183043 MS16-105: Cumulative security update for Microsoft Edge: September 13, 2016

  • 3185848 MS16-106: Security update for Microsoft Graphics Component: September 13, 2016

  • 3178467 MS16-110: Security update for Windows: September 13, 2016

  • 3186973 MS16-111: Security Update for Microsoft Kernel: September 13, 2016

  • 3178469 MS16-112: Security update for Windows Lock Screen: September 13, 2016

  • 3185876 MS16-113: Security Update for Windows Secure Kernel Mode: September 13, 2016

  • 3185879 MS16-114: Security Update for Windows SMBv1 Server: September 13, 2016

  • 3188733 MS16-115: Security update for Microsoft Windows PDF Library: September 13, 2016

  • 3188724 MS16-116: Security Update in OLE Automation for VBScript Scripting Engine: September 13, 2016

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 460 MB and the package for the x64 version is 0.99GB.

How to get this update

Important If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

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 may be prompted to restart the computer after you apply this update.

Update replacement information

This update replaces the previously released update 3185611.

File Information

For a list of the files that are provided in this cumulative update, download the file information for cumulative update 3193821.


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

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