April 10, 2018 - KB4093109 (OS Build 10586.1540)

Applies to: Windows 10 Version 1511



This is the final update available for Windows 10 Enterprise and Windows 10 Education editions as part of the Windows 10, version 1511 additional servicing offer.
IMPORTANT: Additional servicing for version 1511 will not extend beyond this update. To continue receiving quality updates, Microsoft recommends updating to the latest version of Windows 10.


Improvements and fixes

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

  • Addresses additional issues with updated time zone information.
  • Addresses an issue that, in some instances, prevents Internet Explorer from identifying custom controls.
  • Security updates to Internet Explorer, Microsoft scripting engine, Windows RDP, Windows kernel, Windows IIS, Windows datacenter networking, Microsoft scripting engine, Microsoft Edge, Windows Hyper-V , and Windows virtualization and kernel.

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

For more information about the resolved security vulnerabilities, see the Security Update Guide.

Windows Update Improvements
Microsoft has released an update directly to the Windows Update client to improve reliability. Any device running Windows 10 configured to receive updates automatically from Windows Update, including Enterprise and Pro editions, will be offered the latest Windows 10 Feature Update based on device compatibility and Windows Update for Business deferral policy. This does not apply to long-term servicing editions.


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 standalone 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 cumulative update 4093109.


Source: https://support.microsoft.com/en-us/help/4093109


Direct download links for KB4093109 from Microsoft Update Catalog:

Download KB4093109 MSU for Windows 10 Version 1511 32-bit (x86) - 519.7 MB

Download KB4093109 MSU for Windows 10 Version 1511 64-bit (x64) - 919.9 MB