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Release Date:

3/24/2020

Version:

1903-OS Build 18362.752 and 1909-OS Build 18363.752

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 an issue that causes an error when printing to a document share.

  • Updates a performance issue in applications that occurs when content that is protected by digital rights management (DRM) plays or is paused in the background.

  • Updates an issue that prevents the mute button from working on certain devices with the Microsoft Your Phone app.

  • Updates an issue that prevents applications from closing.

  • Updates an issue that causes calendar dates to appear on the wrong day of the week in the clock and date region of the notification area when you select the Samoa time zone.

  • Updates an issue that causes applications to close unexpectedly when a user enters East Asian characters after changing the keyboard layout.

Improvements and fixes

This non-security update includes quality improvements. Key changes include:

  • This build includes all the improvements from Windows 10, version 1903.

  • Addresses an issue that fails to retain the locale language setting in an OS image that is customized during system preparation (Sysprep).

This non-security update includes quality improvements. Key changes include:

  • Addresses an issue that causes an error when printing to a document repository.

  • Addresses an issue that displays a misleading reset message for Win32 apps that are converted to Universal Windows Platform (UWP) apps, such as Microsoft Sticky Notes, Microsoft OneNote, and so on.

  • Addresses a drawing issue with the Microsoft Foundation Class (MFC) toolbar that occurs when dragging in a multi-monitor environment.

  • Addresses an issue that prevents the first key stroke from being recognized correctly in the DataGridView cell.

  • Addresses a performance issue in applications that occurs when content that is protected by digital rights management (DRM) plays or is paused in the background.

  • Addresses an issue that causes attempts to take a screenshot of a window using the PrintWindow API to fail.

  • Addresses an issue that causes File Explorer to close unexpectedly when using roaming profiles between different versions of Windows 10.

  • Addresses an issue that fails to return search results in the Start menu Search box for users that have no local profile.

  • Addresses an issue that causes applications to close unexpectedly when a user enters East Asian characters after changing the keyboard layout.

  • Addresses an issue that prevents the mute button from working on certain devices with the Microsoft Your Phone app.

  • Addresses an issue that causes calendar dates to appear on the wrong day of the week in the clock and date region of the notification area when you select the Samoa time zone.

  • Addresses an issue in which table formatting fails in the PowerShell Integrated Scripting Environment (ISE) during a remote session. The error message is, "Remote host method get_WindowsSize is not implemented".

  • Addresses an issue with reading logs using the OpenEventLogA() function.

  • Addresses an issue that might cause domain controllers (DC) to register a lowercase and a mixed or all uppercase Domain Name System (DNS) service (SRV) record in the _MSDCS.<forest root domain> DNS zone. This occurs when DC computer names contain one or more uppercase characters.

  • Addresses an issue that might cause a delay of up to two minutes when signing in or unlocking a session on Hybrid Azure Active Directory-joined machines.

  • Addresses an issue that causes authentication in an Azure Active Directory environment to fail and no error appears.

  • Addresses an issue that prevents machines that have enabled Credential Guard from joining a domain. The error message is "The server's clock is not synchronized with the primary domain controller's clock."

  • Addresses an issue that causes authentication to fail when using Azure Active Directory and the user’s security identifier (SID) has changed.

  • Addresses an issue that prevents some machines from automatically going into Sleep mode under certain circumstances because of Microsoft Defender Advanced Threat Protection (ATP) Auto Incident Response (IR).

  • Addresses an issue that prevents some machines from running Microsoft Defender ATP Threat & Vulnerability Management successfully.

  • Improves support for non-ASCII file paths for Microsoft Defender ATP Auto IR.

  • Addresses a performance issue with the Windows Runtime (WinRT) API that sends specific absorption rate (SAR) back-off values.

  • Addresses an issue in which a Windows.admx template is missing one of the SupportedOn tags.

  • Addresses an issue that prevents applications from closing.

  • Addresses an issue that creates the Storage Replica administrator group with the incorrect SAM-Account-Type and Group-Type. This makes the Storage Replica administrator group unusable when moving the primary domain controller (PDC) emulator.

  • Restores the constructed attribute in Active Directory and Active Directory Lightweight Directory Services (AD LDS) for msDS-parentdistname.

  • Addresses an issue with evaluating the compatibility status of the Windows ecosystem to help ensure application and device compatibility for all updates to Windows.

  • Addresses an issue that prevents Microsoft User Experience Virtualization (UE-V) settings from roaming to enable the signature files that are used for new messages, forwarded messages, and replies.

  • Addresses an issue that prevents the Network Policy Server (NPS) accounting feature from functioning. This occurs when NPS is configured to use SQL for accounting with the new OLE (compound document) database driver (MSOLEDBSQL.dll) after switching to Transport Layer Security (TLS) 1.2.

  • Addresses an issue that prevents standard user accounts that are configured with the maximum User Account Control (UAC) settings from installing Language Features On Demand (FOD) using the System settings.

  • Addresses an issue that causes attempts to complete the connection to a virtual private network (VPN) to fail; instead, the status remains at “Connecting.”

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

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

Devices using a manual or auto-configured proxy, especially with a virtual private network (VPN), might show limited or no internet connection status in the Network Connectivity Status Indicator (NCSI) in the notification area. This might happen when connected to or disconnected from a VPN or after changing the state between the two. Devices with this issue might also have issues reaching the internet using applications that use WinHTTP or WinInet. Examples of apps that might be affected on devices in this state include, but are not limited to, Microsoft Teams, Microsoft Office, Microsoft Office 365, Microsoft Outlook, Internet Explorer 11, and some versions of Microsoft Edge.

This issue is resolved in KB4554364.

Devices on a domain might be unable to install apps published using a Group Policy Object (GPO). This issue only affects app installations that use .msi files. It does not affect any other installation methods, such as from the Microsoft Store.

This issue is resolved in KB4549951.

After installing this update on a Windows 10 device with a wireless wide area network (WWAN) LTE modem, reaching the internet might not be possible. However, the Network Connectivity Status Indicator (NCSI) in the notification area might still indicate that you are connected to the internet.

This issue is resolved in KB4559004.

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. 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 or Microsoft Update

Yes

Go to Settings > Update & Security > Windows Update. In the Optional updates available area, you’ll find the link to download and install the update.

Microsoft Update Catalog

Yes

To get the standalone 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: Updates

 

File information

For a list of the files that are provided in this update, download the file information for cumulative update 4541335

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.

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