October Servicing Stack Update Changes in Classification

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. 

If you are using Windows Update/WSUS/SCCM, the latest SSU will be offered to you automatically.

To get the stand-alone package for the latest SSU, go to the Microsoft Update Catalog.

This is a re-release servicing stack same KB , but its classification has changed

In October , Microsoft re-classified and re-released the servicing stack update (SSU) of each OS build.

What this means is they have superseded the existing KB binaries and updated the classification of the patch.


Some people were only applying Security patches and not applying Critical patches

Up to September 2018 the SSU was classified as a Critical patch.

Unfortunately a number of Security patches rely on the SSU being up to date, so patches were failing


Consequently, future SSU releases, from October 2018 onward, will get marked “security” not “Critical”

As an example you should now see in WUS and SCCM consoles multiple KB3177467 updates, but you will see all the updates marked Critical Updates have been superseded and new updates are now classified as “Security Updates”


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