Microsoft released quality improvements to the servicing stack for all Windows 10 versions, the component designed to allow users to receive and install Windows updates.
Microsoft states that this critical servicing stack update “addressed an issue in which adding vulnerable boot level components to the Secure Boot disallow list (dbx) may cause the system not to start.”
All Windows 10 customers are advised to first update the Windows 10 servicing stack to the latest version before trying to install the KB4515384 and the KB4512578 cumulative updates.
These CUs were also released today for Windows 10 v1903 and Windows Server v1903, and for Windows 10 v1809, Windows Server v1809, and Windows Server 2019 respectively.
Servicing stack update packages available via Microsoft’s Update Catalog
Installing the servicing stack updates (SSU) ensures that the users’ devices can receive and install Microsoft security fixes with the help of a reliable and robust servicing stack.
Windows 10 users are also urged to update their systems’ servicing stack as soon as possible to avoid potential issues that could appear during the installation process of both feature and quality updates.
Microsoft states in the servicing stack support document that:
The table embedded below contains all the products for which the servicing stacks have been updated, as well as the related support articles containing links to the Microsoft Update Catalog download pages.
|Servicing stack updates|
|Windows 10 1903 / Windows Server, version 1903||KB4515383|
|Windows 10 1809 / Windows Server 2019||KB4512577|
|Windows 10 1803 / Windows Server, version 1803||KB4512576|
|Windows 10 1709||KB4512575|
|Windows 10 1703||KB4511839|
|Windows 10 1607 / Server 2016||KB4512574|
|Windows 10 1507||KB4512573|
Installing servicing stack updates
Servicing stack updates contain “the ‘component-based servicing stack’ (CBS), which is a key underlying component for several elements of Windows deployment, such as DISM, SFC, changing Windows features or roles, and repairing components,” as explained by Microsoft in the Windows IT Pro Center.
These updates can be installed automatically through Windows Update or using the standalone update packages available for download from the Microsoft Update Catalog website — links available for all Windows 10 versions in the table above.
Windows Server users can also use the Windows Server Update Services (WSUS) to mass deploy the update to all computers on their network.
Servicing stack updates installation notes:
• Installing servicing stack update does not require restarting the device, so installation should not be disruptive.
• Servicing stack update releases are specific to the operating system version (build number), much like quality updates.
• Search to install latest available Servicing stack update for Windows 10.
Windows 10 users who encounter issues while installing the latest updates can follow this guided walk-through for fixing the errors.
Microsoft also published a support document designed to help customers to troubleshoot Windows 10 update problems when dealing with update issues.