Servicing stack update for Windows 10, Version 1507: July 9, 2019

Applies to: Windows 10


This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Key changes include:

  • Addresses an issue with a Secure Boot feature update that may cause BitLocker to go into recovery mode because of a race condition.

Microsoft strongly recommends you install the latest servicing stack update (SSU) for your operating system before installing the latest cumulative update (LCU). Installing servicing stack updates (SSU) ensure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft security fixes.

How to get this update

Method 1: Windows Update

This update will be downloaded and installed automatically.

Note: This update is also available through Windows Server Update Services (WSUS).

Method 2: Microsoft Update Catalog

To get the standalone package for this update, go to the Microsoft Update Catalog website.

More information


There are no prerequisites for installing this update.

Restart information

You don't have to restart your computer after you apply this update.

Update replacement information

This update replaces the previously released update KB4498353.


Direct download links for KB4509090 MSU file from Microsoft Update Catalog:

Download KB4509090 MSU for Windows 10 v1507 32-bit (x86) - 5.3 MB

Download KB4509090 MSU for Windows 10 v1507 64-bit (x64) - 11.7 MB