UPDATE 3/12: KB4551762 CU Win 10 v1903 build 18362.720 and v1909 build 18363.720

March 10, 2020 - KB4540673 (OS Builds 18362.719 and 18363.719)

Applies to: Windows 10 version 1903, Windows Server version 1903, Windows 10 version 1909, Windows Server version 1909

What's new for Windows 10, version 1909 and Windows 10, version 1903 release notes
Windows 10, versions 1903 and 1909 share a common core operating system and an identical set of system files. As a result, the new features in Windows 10, version 1909 were included in the recent monthly quality update for Windows 10, version 1903 (released October 8, 2019), but are currently in a dormant state. These new features will remain dormant until they are turned on using an enablement package, which is a small, quick-to-install “master switch” that simply activates the Windows 10, version 1909 features.
To reflect this change, the release notes for Windows 10, version 1903 and Windows 10, version 1909 will share an update history page. Each release page will contain a list of addressed issues for both 1903 and 1909 versions. Note that the 1909 version will always contain the fixes for 1903; however, 1903 will not contain the fixes for 1909. This page will provide you with the build numbers for both 1909 and 1903 versions so that it will be easier for support to assist you if you encounter issues.
For more details about the enablement package and how to get the feature update, see the Windows 10, version 1909 delivery options blog.

For more information about the various types of Windows updates, such as critical, security, driver, service packs, and so on, please see the following article.
Note Follow @WindowsUpdate to find out when new content is published to the release information dashboard.

Highlights

• Updates to improve security when using Microsoft Edge and Internet Explorer.
• Updates for verifying user names and passwords.
• Updates to improve security when using external devices (such as game controllers, printers, and web cameras).

Improvements and fixes

Windows 10, version 1909

This security update includes quality improvements. Key changes include:

• This build includes all the improvements from Windows 10, version 1903.
• No additional issues were documented for this release.

Windows 10, version 1903

Note This release also contains updates for Microsoft HoloLens (OS Build 18362.1056) released March 10, 2020. Microsoft will release an update directly to the Windows Update Client to improve Windows Update reliability on Microsoft HoloLens that have not updated to this most recent OS Build.

This security update includes quality improvements. Key changes include:

• Addresses an issue that prevents certain users from upgrading the OS because of corrupted third-party assemblies.
• Security updates to Windows App Platform and Frameworks, Windows Media, Windows Silicon Platform, Microsoft Edge, Internet Explorer, Windows Fundamentals, Windows Authentication, Windows Peripherals, Windows Update Stack, and Windows Server.

If you installed earlier updates, only the new fixes contained in this package will be downloaded and installed on your device.

For more information about the resolved security vulnerabilities, please refer to the Security Update Guide.

Windows Update Improvements
Microsoft has released an update directly to the Windows Update client to improve reliability. Any device running Windows 10 configured to receive updates automatically from Windows Update, including Enterprise and Pro editions, will be offered the latest Windows 10 feature update based on device compatibility and Windows Update for Business deferral policy. This doesn't apply to long-term servicing editions.

Known issues in this update

Symptom	Workaround
When using Windows Server containers with the March 10, 2020 updates, you might encounter issues with 32-bit applications and processes.	For important guidance on updating Windows containers, please see Windows container version compatibility.

How to get this update

Before installing this update

Microsoft strongly recommends you install the latest servicing stack update (SSU) for your operating system before installing the latest cumulative update (LCU). SSUs improve the reliability of the update process to mitigate potential issues while installing the LCU and applying Microsoft security fixes. For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.

If you are using Windows Update, the latest SSU (KB4541338) will be offered to you automatically. To get the standalone package for the latest SSU, search for it in the Microsoft Update Catalog.

Install this update

Release Channel	Available	Next Step
Windows Update and Microsoft Update	Yes	None. This update will be downloaded and installed automatically from Windows Update.
Microsoft Update Catalog	Yes	To get the stanalone package for this update, go to the Microsoft Update Catalog website.
Windows Server Update Services (WSUS)	Yes	This update will automatically sync with WSUS if you configure Products and Classifications as follows: Product: Windows 10, version 1903 and later Classification: Security Updates

File information

For a list of the files that are provided in this update, download the file information for cumulative update 4540673.

Note Some files erroneously have “Not applicable” in the “File version” column of the CSV file. This might lead to false positives or false negatives when using some third-party scan detection tools to validate the build.

Source: https://support.microsoft.com/en-us/...date-kb4540673

See also: Microsoft Guidance for Disabling SMBv3 Compression in Windows 10


Direct download links for KB4540673 MSU file from Microsoft Update Catalog:

Download KB4540673 MSU for Windows 10 v1903 and v1909 32-bit (x86) - 191.6 MB

Download KB4540673 MSU for Windows 10 v1903 and v1909 64-bit (x64) - 354.6 MB

Download KB4540673 MSU for Windows 10 v1903 and v1909 ARM64 - 396.1 MB

How to Find Windows 10 Version Number

How to Find Windows 10 Build Number

Known and Resolved issues for Windows 10 version 1903

Posted By: Brink
10 Mar 2020