This update makes quality improvements to the servicing stack, which is the component that installs Windows updates.
We strongly recommend you install the latest servicing stack update (SSU) for your operating system before installing the latest cumulative update (LCU). 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 security fixes. For general information on SSUs, please see the following articles:
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. It 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.
Method 3: Windows Server Update Services
This update is available through Windows Server Update Services (WSUS).
You must have update KB 4490628 installed before you apply this update.
You don't have to restart your computer after you apply this update.
Update replacement information
This update does not replace any previously released update.
The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.
Windows 7 and Windows Server 2008 R2 file information
The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.