Patchday: Windows 10 Updates (April 14, 2020)

[German]On April 14, 2020 (second Tuesday of the month, Patchday at Microsoft) several cumulative updates for the supported Windows 10 builds were released. Here are some details about the respective updates.

A list of the updates can be found on this Microsoft website. I have extracted the details below. The update installation requires an existing current Servicing Stack Updates (SSUs). Meanwhile, Microsoft publishes an overview of current Servicing Stack Updates (SSUs) under ADV990001 (if it is not up to date, have the Microsoft Update Catalog search for Servicing Stack Updates).

Updates for Windows 10 Version 190x

Microsoft provides the same update packages for the Windows 10 builds 1903 and 1909 that were released in 2019. The following updates are available for the Windows 10 May 2019 Update (version 1903) and the Windows 10 November 2019 Update (version 1909).

Update KB4549951 for Windows 10 Version 190x

Cumulative Update KB4549951 raises  the OS build to 18362.778 (Windows 10 V1903) or 18363.778 (Windows 10 V1909). The update is available for Windows 10 version 1903, for Windows 10 version 1909, and for Windows Server version 1903 and Windows Server version 1909. It contains quality improvements but no new operating system features. Here is the list of enhancements, referred to by Microsoft as highlights:

• Updates to improve security when using Microsoft Office products.
• Updates to improve security when Windows performs basic operations.
• Updates for storing and managing files.

The update adds the following fixes and improvements to Windows 10 version 1909, which are identical to version 1903 (update is also available for the Hololens)

• Addresses an issue that prevents certain apps from installing if they are published using a Group Policy Object.
• Addresses an issue that prevents a wired network interface from obtaining a new Dynamic Host Configuration Protocol (DHCP) IP address on new subnets and virtual LANs (VLAN) after wired 802.1x re-authentication. The issue occurs if you use VLANs that are based on accounts and a VLAN change occurs after a user signs in.
• Security updates to the Microsoft Scripting Engine, Windows App Platform and Frameworks, Windows Cloud Infrastructure, Windows Virtualization, Microsoft Graphics Component, Windows Kernel, Windows Media, Windows Shell, Windows Management, Windows Fundamentals, Windows Virtualization, Windows Storage and Filesystems, Windows Update Stack, and the Microsoft JET Database Engine .

This update is automatically downloaded and installed by Windows Update. This update is also available in the Microsoft Update Catalog and via WSUS. Microsoft strongly recommends that you install the latest service stack update (SSU) for your operating system before you install the latest cumulative update (LCU). For this update, Microsoft indicates that there is no known issue.

Microsoft has also released an update directly for the Windows Update Client to improve its reliability. This is rolled out outside of Windows Update if the machine is compatible and not an LTSC variant and updates have not been blocked by GPO.

Servicing Stack Update KB4552152

On March 10, Microsoft also released the SSU KB44552152 for Windows 10 version 1903 and 1909. Microsoft says:

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 SSU should have been installed before installing any other cumulative updates.

Updates for Windows 10 Version 1809

The following updates are available for Windows 10 October 2018 Update (version 1809) and Windows Server 2019.

Update KB4549949 for Windows 10 Version 1809

Cumulative Update KB4549949 the OS build (according to MS) to 17763.1158 and includes quality improvements but no new operating system features. Here is the list of improvements, called highlights by Microsoft:

• Updates to improve security when Windows performs basic operations.
• Updates to improve security when using Microsoft Office products.
• Updates for storing and managing files.

Added are the following fixes and improvements to the Windows version:

• Addresses an issue that prevents certain apps from installing if they are published using a Group Policy Object.
• Security updates to the Microsoft Scripting Engine, Windows Kernel, Windows App Platform and Frameworks, Microsoft Graphics Component, Windows Media, Windows Shell, Windows Management, Windows Cloud Infrastructure, Windows Fundamentals, Windows Virtualization, Windows Core Networking, Windows Storage and Filesystems, Windows Update Stack, and the Microsoft JET Database Engine.

This update is automatically downloaded and installed by Windows Update. This update is also available in the Microsoft Update Catalog. Microsoft strongly recommends that you install the latest service stack update (SSU) for your operating system before you install the latest cumulative update (LCU). Microsoft lists a known issue that this update causes. For details, see the KB article.

Microsoft has also released an update directly to the Windows Update client to improve its reliability. This is rolled out outside of Windows Update if the machine is compatible and is not an LTSC variant and updates have not been blocked by GPO.

Servicing Stack Update KB4549947

On March 14, Microsoft also released the SSU KB4549947  for Windows 10 version 1809. Microsoft writes that it brings improvements to the servicing stack to make the update installation more reliable. SSU should be installed before installing any further cumulative updates.

Updates for Windows 10 Version 1507 bis 1803

For Windows 10 RTM up to version 1803, various updates are available for the LTSC versions and, if necessary, the Enterprise versions. The Home and Pro versions on the other hand have been dropped from support. Here is a short overview.

• Windows 10 Version 1803: Update KB4550922 is only available for Enterprise and Education. The update raises the OS build to 17134.1425. The fixes mentioned in the KB article are included. This update is automatically downloaded and installed by Windows Update, but is available for download from the Microsoft Update Catalog. Before manual installation, the latest Servicing Stack Update (SSU) must be installed. Details, including known issues, can be found in the KB article.
• Windows 10 Version 1709: Update KB4550927 is only available for Enterprise and Education. The update raises the OS build to 16299.1806. The fixes mentioned in the KB article are included. This update is automatically downloaded and installed by Windows Update, but is available for download from the Microsoft Update Catalog. Vor Before manual installation, the latest Servicing Stack Update (SSU) must be installed. Details, including known issues, can be found in the KB article.
• Windows 10 Version 1703: Update KB4550939 is only available for the Surface Hub. The update raises the OS build to 16299.2346. The fixes mentioned in the KB article are included.
• Windows 10 Version 1607: Update KB4550929 is now available only to Enterprise LTSC. The update raises the OS build to 14393.3630. The fixes mentioned in the KB article are included. This update is automatically downloaded and installed by Windows Update, but is available for download from the Microsoft Update Catalog. Before manual installation, the latest Servicing Stack Update (SSU) must be installed. Details, including known issues, can be found in the KB article.
• Windows 10 Version 1507: Update KB4550930 is available for the RTM version (LTSC). The update raises the OS build to 10240.18545. The fixes mentioned in the KB article are included. This update is automatically downloaded and installed by Windows Update, but is available for download in the Microsoft Update Catalog. Before manual installation, the latest Servicing Stack Update (SSU) must be installed. Details, including known issues, can be found in the KB article. Details can be found in the KB article.

There was no update for Windows 10 V1511 and V1703, because these versions were dropped from support. Details about the above updates can be found in the respective Microsoft KB articles in case of doubt.

Similar articles:
Microsoft Office Patchday (April 7, 2020)
Microsoft Security Update Summary (April 14, 2020)
Patchday: Windows 10 Updates (April 14, 2020)