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Release Date:

28/01/2020

Version:

1903-OS Build 18362.628 and 1909-OS Build 18363.628

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

  • Improves the accuracy of Windows Hello face authentication.

  • Updates an issue that changes the user-customized order of tiles in the Start menu even though the layout is locked or partially locked.

  • Updates an issue that causes a grey box to appear when you search within Control Panel and File Explorer.

  • Updates an issue that prevents File Explorer's Search Bar from pasting clipboard content using the right mouse button (right-click).

  • Updates an issue that prevents File Explorer's Search Bar from receiving user input.

  • Updates an issue that causes the touch keyboard to close when you select any key.

  • Updates an issue that, in certain cases, causes multiplayer PC games to drop the invitation to play the game in multiplayer mode.

  • Updates an issue that sometimes causes an error when you unplug a USB type C hub flash drive.

  • Updates an issue that displays incorrect indicators for offline and online files.

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 prevents File Explorer's Search Bar from pasting clipboard content using the right mouse button (right-click).

  • Addresses an issue that prevents File Explorer's Search Bar from receiving user input.

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

  • Improves the accuracy of Windows Hello face authentication.

  • Addresses an issue with Windows Mixed Reality that occurs after upgrading to a new version of Microsoft Edge.

  • Addresses an issue with download notifications that have multiple short-duration tabs and redirects.

  • Addresses an issue that changes the user-customized order of tiles in the Start menu even though the layout is locked or partially locked.

  • Addresses an issue that causes a grey box to appear when you search within Control Panel and File Explorer.

  • Addresses an issue with a memory leak in ctfmon.exe that occurs when you refresh an application that has an editable box.

  • Addresses a keyboard reliability issue for classic apps in the Windows Mixed Reality home.

  • Addresses an issue that, in some instances, prevents the Language Bar from appearing when the user signs in to a new session. This occurs even though the Language Bar is configured properly.

  • Addresses an issue that causes the touch keyboard to close when you select any key.

  • Addresses an issue that prevents software Indirect Display drivers from being signed with more than one certificate.

  • Addresses an issue that, in certain cases, causes multiplayer PC games to drop the invitation to play the game in multiplayer mode.

  • Addresses an issue with unsigned program files that will not run when Windows Defender Application Control is in Audit Mode, but will allow unsigned images to run.

  • Addresses an issue that causes the Local Security Authority Subsystem Service (LSASS) process to stop working when you sign in using an updated user principal name (UPN) (for example, changing UserN@contoso.com to User.Name@contoso.com). The error code is, “0xc0000005 (STATUS_ACCESS_VIOLATION).”

  • Addresses an issue that sometimes causes an error when you unplug a USB type C hub flash drive.

  • Addresses an issue with the Always On Virtual Private Network (VPN) that fails to remove the Name Resolution Policy Table (NRPT) rules after you disconnect.

  • Addresses an issue that might cause the Print Management console to display script errors when you enable the Extended View option.

  • Addresses an issue that causes the Windows firewall to drop network traffic from Modern apps, such as Microsoft Edge, when you connect to a corporate network using a virtual private network (VPN).

  • Addresses an issue that displays incorrect indicators for offline and online files.

  • Addresses an issue with ntdsutil.exe that prevents you from moving Active Directory database files. The error is, “Move file failed with source <original_full_db_path> and Destination <new_full_db_path> with error 5 (Access is denied.)”

  • Addresses an issue in which netdom.exe fails to correctly identify trust relationships when an unconstrained delegation is explicitly enabled by adding bitmask 0x800 to the trust object. The bitmask setting is required because of security changes to the default behavior of unconstrained delegations in Windows updates released on or after July 8, 2019. For more information, see KB4490425and 6.1.6.7.9 trustAttributes.

  • 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 might cause the Application Virtualization (App-V) Streaming Driver (appvstr.sys) to leak memory when you enable Shared Content Store (SCS) mode.

  • Addresses an issue that corrupts a log file when a storage volume is full and data is still being written to the Extensible Storage Engine Technology (ESENT) database.

  • Addresses an issue in which code refactoring breaks optimization for writing metadata, which increases Logical Volume Integrity Descriptors (LVID).

  • Addresses an issue with remote procedure call (RPC) runtime that might cause memory to leak. As a result, performance degrades, which causes high CPU usage, slowness, or resource depletion.

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

Microsoft is not currently aware of any issues with this update.

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 (KB4528759) 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 4532695

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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