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

The servicing stack includes the files and resources that are required to service a Windows image. This includes the Package Manager executable, the required servicing libraries, and other resources.

Yes, all versions of Windows and Windows Server might need an SSU to address an issue, including the latest version of Windows 10 and Windows Server.

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

Learn more about update KB4555449, including improvements and fixes, any known issues, and how to get the 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 security fixes.

Learn more about update KB 4531786, including improvements and fixes, any known issues, and how to get the update.

Learn about this SSU update for Windows 7 SP1 and Server 2008 R2 SP1, including improvements and fixes, any known issues, and how to get the update.

Describes a servicing stack update for Windows 7 SP1 and Windows Server 2008 R2 SP1.

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.