October 9, 2018—KB4462919 (OS Build 17134.345)

Applies to: Windows 10, version 1803

Note  This release also contains updates for Microsoft HoloLens (OS Build 17134.345) released October 9, 2018.

Improvements and fixes


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

  • Security updates to Internet Explorer, Windows Media Player, Microsoft Graphics Component, Windows Peripherals, Windows Shell, Windows Kernel, Windows Datacenter Networking, Windows Storage and Filesystems, Microsoft Edge, Microsoft Scripting Engine, Windows Linux, and the Microsoft JET Database Engine. 

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

For more information about the resolved security vulnerabilities, please refer to the Security Update Guide.

Known issues in this update


Symptom Workaround

After you install the August Preview of Quality Rollup or September 11, 2018 .NET Framework update, instantiation of SqlConnection can throw an exception. For more information about this issue, see the following article in the Microsoft Knowledge Base:

4470809 SqlConnection instantiation exception on .NET 4.6 and later after August-September 2018 .NET Framework updates

Microsoft is working on a resolution and will provide an update in an upcoming release.

After installing this update, some users cannot set Win32 program defaults for certain app and file type combinations using the Open with… command or Settings > Apps > Default apps.

In some cases, Microsoft Notepad or other Win32 programs cannot be set as the default.

This issue is resolved in KB4467682.

After installing this update, users may not be able to use the Seek Bar in Windows Media Player when playing specific files. This issue does not affect normal playback.

This issue is resolved in KB4471324.

How to get this update


Before installing this update

Windows cumulative updates require that you install the latest servicing stack update (SSU) for your operating system before installing the latest cumulative update (LCU). This helps to mitigate potential issues while installing the LCU. For more information, see Servicing stack updates.

If you are using Windows Update, the latest SSU (KB4456655) will be offered to you automatically. To get the stand-alone package for the latest SSU, go to the Microsoft Update Catalog

Install 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.

File information

For a list of the files that are provided in this update, download the file information for cumulative update 4462919