This update makes quality improvements to the servicing stack component that installs Windows updates. Key changes include:
- Addresses an issue in the servicing stack when you install an update that has been signed by using only the SHA-2 hash algorithm.
Microsoft strongly recommends you always install the latest servicing stack update (SSU) for your operating system before installing the latest monthly security update. Installing servicing stack updates (SSU) makes sure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates.
Restart stuck on "Stage 2 of 2" or "Stage 3 of 3"
After you install a servicing stack update together with other updates, a restart may be required to complete the installation. During this restart, you may find yourself stuck at a particular stage and see a "Stage 2 of 2" or "Stage 3 of 3" message.
If you experience this issue, press Ctrl+Alt+Delete to continue to log on. This should occur only one time and does not prevent updates from installing successfully.
Note In managed environments, such as by using Windows Server Update Services (WSUS), you can avoid this issue by deploying this update as a standalone update.
How to get this update
Method 1: Windows Update
This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to turn on automatic updating, see Windows Update: FAQ.
Method 2: Microsoft Update Catalog
To get the standalone package for this update, go to the Microsoft Update Catalog website.
Update detail information
You must install the latest SHA-2 update (KB4474419) released September 23, 2019 and then restart your device before you apply this update. If you use Windows Update, the latest SHA-2 update will be offered to you automatically. For more information about SHA-2 updates, see 2019 SHA-2 Code Signing Support requirement for Windows and WSUS.
Post installation information
After you install this update, we recommend that you install the latest servicing stack update (SSU). The latest SSU for your version of Windows can be found in ADV990001 | Latest Servicing Stack Updates..
You do not have to restart the computer after you apply this update.
Update replacement information
This update replaces the previously released update 3177467.
The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
Windows 7 and Windows Server 2008 R2 file information
The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.
For information on SSUs, see the following articles:
Learn about the terminology that Microsoft uses to describe software updates.