Friday, November 18, 2022

April 13, 2021 Servicing Stack Update (KB5001449) - Microsoft Support [MS]

Release Date:




Improvements and fixes

The servicing stack is the component that installs updates. Servicing stack updates (SSU) ensure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates. 

This servicing stack update makes quality improvements including the following:

  • Addresses an issue that might prevent CVE-2020-0689 from installing and generates a TRUST_E_NOSIGNATURE error in the Windows cbs.log file.

How to get this update

The April 13, 2021 servicing stack update (KB5001449) for Azure Stack HCI is delivered from the release channels below. To install it on your Azure Stack HCI cluster, see Update Azure Stack HCI clusters.

Install this update

Release Channel


Next Step

Windows Update and Microsoft Update


None. This update will be downloaded and installed automatically from Windows Update.

Microsoft Update Catalog


To get the standalone package for this update, go to the Microsoft Update Catalog website.

Windows Server Update Services (WSUS)


This update will automatically sync with WSUS if you configure Products and Classifications as follows:

Product: Azure Stack HCI

Classification: Security Updates

Restart information

You don't have to restart your computer after you apply this update.

Removal information

Servicing stack updates (SSUs) make changes to how updates are installed and cannot be uninstalled from the device.

File information

For a list of the files that are provided in this update, download the file information for cumulative update 5001449.


For information on SSUs, see the following articles:

Learn about the terminology that Microsoft uses to describe software updates.

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