Patchday: Windows 10-Updates (February 9, 2021)

[German]On February 9, 2021 (second Tuesday of the month, Patchday at Microsoft), several cumulative updates were released for the supported Windows 10 builds. Here are some details about each update.

A list of the updates can be found on this Microsoft website. I have pulled out the details below. Update installation requires an existing current Servicing Stack Updates (SSUs).

Updates for Windows 10 Version 2004/20H2

For Windows 10 version 2004 released in May 2020 as well as Windows 10 version 20H2 offered via update search in October 2020, Microsoft provides the same update packages mentioned below.

Update KB4601319 for Windows 10 Version 2004/20H2

Cumulative Update KB4601319 raises the OS build to 19041.804 for Windows 10 version 2004 and to 19042.804 for Windows 10 version 20H2. The update is available for Windows 10 version 2004, Windows 10 version 20H2, and Windows Server version 2004 and Windows Server version 20H2. It includes quality improvements but no new operating system features. Here's the list of improvements, referred to by Microsoft as highlights:

• Updates to improve security when using input devices such as a mouse, keyboard, or pen.
• Updates for verifying usernames and passwords.

In addition, there are the following fixes (among others, the chkdsk /f bug is fixed) and improvements:

• Addresses a possible elevation of privilege vulnerability in the win32k component.
• Addresses an issue that might damage the file system of some devices and prevent them from starting up after running chkdsk /f.
• Security updates to the Windows App Platform and Frameworks, Windows Apps, Windows Input and Composition, Windows Cloud Infrastructure, Windows Management, Windows Authentication, Windows Fundamentals, Windows Cryptography, Windows Virtualization, Windows Core Networking, and Windows Hybrid Cloud Networking.

This update is automatically downloaded and installed by Windows Update. This update is also available from Microsoft Update Catalog and via WSUS. Microsoft strongly recommends that you install the latest Service Stack Update (SSU) KB4598481 for your operating system before installing the latest Cumulative Update (LCU). For the update, Microsoft states that users of Microsoft Input Method Editor (IME) for Chinese and Japanese may receive an error, or the application may become unresponsive or close when attempting to drag with the mouse. A new issue has been added for Discord. The certificate issue is also still present. Details can be found inKB4598242.

In addition, Microsoft has 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 via GPO.

Updates for Windows 10 Version 1909

Windows 10 version 1903 is out of support on December 8, 2020. The following updates are available for Windows 10 version 1909 released in 2019.

Update KB4601315 for Windows 10 Version 1909

Cumulative update KB4601315 raises the Windows 10 V1909 OS build to 18363.1377. The update is available for Windows 10 version 1909 as well as Windows Server version 1909. It includes quality improvements but no new operating system features. Here's the list of improvements, described by Microsoft as highlights:

• Updates to improve security when using input devices such as a mouse, keyboard, or pen.
• Updates for verifying usernames and passwords.

In addition, there are the following fixes and improvements to Windows 10 version 1909:

• Addresses a possible elevation of privilege vulnerability in the win32k component.
• Security updates to Windows App Platform and Frameworks, Windows Apps, Windows Input and Composition, Windows Cloud Infrastructure, Windows Management, Windows Authentication, Windows Fundamentals, Windows Cryptography, Windows Virtualization, Windows Core Networking, and Windows Hybrid Cloud Networking.

This update is automatically downloaded and installed by Windows Update. This update is also available from Microsoft Update Catalog and via WSUS. Microsoft strongly recommends that you install the latest Service Stack Update (SSU) for your operating system before installing the latest Cumulative Update (LCU). For the update, Microsoft cites the certificate issue mentioned above, which is documented in KB4601395.

In addition, Microsoft has 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 via GPO.

Updates for Windows 10 Version 1809

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

Update KB4601345 for Windows 10 Version 1809

Cumulative update KB4601345 raises the OS build (according to MS) to 17763.1757 and includes quality improvements but no new OS features. Here is the list of improvements, described by Microsoft as highlights:

• Updates to improve security when using input devices such as a mouse, keyboard, or pen.
• Updates for verifying usernames and passwords.

In addition, there are the following fixes and improvements to the Windows version:

• Addresses a possible elevation of privilege vulnerability in the win32k component.
• Security updates to Windows App Platform and Frameworks, Windows Apps, Windows Input and Composition, Windows Cloud Infrastructure, Windows Management, Windows Authentication, Windows Fundamentals, Windows Cryptography, Windows Virtualization, and Windows Core Networking.

This update is automatically downloaded and installed by Windows Update, but is also available from Microsoft Update Catalog. Microsoft strongly recommends that you install the latest Service Stack Update (SSU) for your operating system before installing the latest Cumulative Update (LCU). Microsoft lists the known issue that the update causes. Error 0x800f0982 – PSFX_E_MATCHING_COMPONENT_NOT_FOUND may occur during the update installation. Details can be found in the KB article.

In addition, Microsoft has 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 via GPO.

Updates for Windows 10 Version 1507 till 1803

For Windows 10 RTM up to version 1803, various updates are available for the LTSC versions and possibly the Enterprise versions. The Home and Pro variants, on the other hand, have fallen out of support. These updates are automatically downloaded and installed by Windows Update, but are available for download from the Microsoft Update Catalog (search for the KB number). Before manual installation, the latest Servicing Stack Update (SSU) must be installed. Details can be found in the respective KB article.

• Windows 10 Version 1803: Update KB4601354 is only available for Enterprise and Education. The update raises the OS build 17134.2026.
• Windows 10 Version 1703: Update KB44601330 is only available for Enterprise and Education. The update raises the OS build 15063.2642.
• Windows 10 Version 1607: Update KB4601318 is only available for Enterprise LTSC. The update raises the OS build to 14393.4225.
• Windows 10 Version 1507: Update KB4601331 is available for the RTM version (LTSC). The update raises the OS build to 10240.18842.

There was no update for the remaining Windows 10 versions, as these versions have fallen out of support. Details about the above updates can be found in the respective Microsoft KB articles if in doubt.

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