February 27, 2020—KB4535996 (OS Builds 18362.693 and 18363.693)

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 prevents the speech platform application from opening for several minutes in a high noise environment.
Updates an issue that reduces the image quality in the Windows Mixed Reality (WMR) home environment.
Updates an issue that might prevent ActiveX content from loading.
Improves the battery performance during Modern Standby mode.
Updates an issue that causes Microsoft Narrator to stop working when a user session is longer than 30 minutes.
Addresses an issue that adds an unwanted keyboard layout as the default after an upgrade even if you have already removed it.
Updates an issue that prevents the Windows Search box from rendering properly.
Updates an issue that prevents the printer settings user interface from displaying properly.
Updates an issue that prevents some applications from printing to network printers.

Improvements and fixes

This non-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.

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

Addresses an issue that prevents the speech platform application from opening for several minutes in a high noise environment.
Addresses an issue that reduces the image quality in the Windows Mixed Reality (WMR) home environment.
Improves Urlmon resiliency when receiving incorrect Content-Length for a PeerDist response.
Addresses an issue with rendering PeerDist-encoded content in Internet Explorer and Microsoft Edge.
Addresses an issue that might prevent ActiveX content from loading.
Addresses an issue that might cause Microsoft browsers to bypass proxy servers.
Improves the battery performance during Modern Standby mode.
Addresses an issue that prevents Centennial apps from opening in certain scenarios.
Addresses an issue that prevents the OpenFile() function in the KernelBase.dll library from handling file paths longer than 128 characters.
Addresses an issue that prevents a user from upgrading or uninstalling some Universal Windows Platforms (UWP) apps in certain scenarios.
Addresses an issue that causes Microsoft Narrator to stop working when a user session is longer than 30 minutes.
Addresses an issue that adds an unwanted keyboard layout as the default after an upgrade or migration even if you have already removed it.
Addresses an issue with editing the properties of .mov files.
Addresses an issue that causes usbvideo.sys to stop working intermittently when a device resumes from Suspend or Sleep after using the Camera app or Windows Hello.
Addresses an issue that might prevent the "Allow uninstallation of language features when a language is uninstalled" Group Policy from taking effect.
Addresses an issue that prevents the Windows Search box from rendering fully in the space allotted for it.
Addresses an issue that prevents the Input Method Editor (IME) user dictionary from being used when leveraging folder redirection with user profiles.
Addresses an issue that might prevent the Windows Search box from showing results.
Addresses an issue that causes the installation process to stop responding when installing Windows on a VMware guest machine that has a USB 3.0 hub attached.
Addresses an issue with Windows Autopilot self-deploying mode and white glove deployment.
Addresses an issue in which re-running PowerShell workflows might fail with compilation errors for long sessions.
Improves Event Forwarding scalability to ensure thread safety and increase resources.
Addresses an issue in the Windows activation troubleshooter that prevents users from reactivating their copy of Windows using the product key stored in their Managed Service Account (MSA).
Addresses an issue that prevents some applications, which are deployed using the Microsoft Installer (MSI) from being installed using the mobile device management (MDM) platform. This issue occurs because of a missing property in the MSI metadata.
Addresses an issue that generates an “unknown username or bad password” error when attempting to sign in. This occurs in an environment that has a Windows Server 2003 domain controller (DC) and a Windows Server 2016 or later DC.
Addresses an issue with sign in scripts that fail to run when a user signs in or signs out.
Addresses an issue that continues to collect IsTouchCapable and GetSystemSku data when they should no longer be collected.
Addresses an issue that causes some Azure Active Directory (AAD) joined systems, which were upgraded to Windows 10, version 1903, to erroneously rejoin the AAD domain.
Addresses an issue in which the WinHTTP AutoProxy service does not comply with the value set for the maximum Time To Live (TTL) on the Proxy Auto-Configuration (PAC) file. This prevents the cached file from updating dynamically.
Addresses an issue that causes the wrong printer name to be selected when you click the Print button in the SQL reporting service.
Addresses an issue that prevents the printer settings user interface from displaying properly.
Addresses an issue in the Network Profile Service that might cause a computer to stop responding.
Addresses an issue that prevents some applications from printing to network printers.
Addresses an issue that might cause a printer to be a hidden device in Device Manager after a restart.
Addresses an issue that causes Host Networking Service (HNS) PortMapping policies to leak when the container host is reinstated after a restart.
Addresses a stop error (0x000000CA) that occurs when you mount a Resilient File System (ReFS) volume without a physical device. This might occur in some backup solution scenarios.
Addresses an Open Database Connectivity (ODBC) issue that causes an infinite loop in the retry logic when there are several lost connections in the connection pool.
Addresses an issue that causes the Local Security Authority Subsystem Service (LSASS) to stop working and triggers a restart of the system. This issue occurs when invalid restart data is sent with a non-critical paged search control.
Addresses an issue that intermittently generates Online Certificate Status Protocol (OSCP) Responder audit event 5125 to indicate that a request was submitted to the OCSP Responder Service. However, there is no reference to the serial number or the domain name (DN) of the issuer of the request.
Addresses an issue that causes queries against large keys on Ntds.dit to fail with the error, “MAPI_E_NOT_ENOUGH_RESOURCES”. This issue might cause users to see limited meeting room availability because the Exchange Messaging Application Programming Interface (MAPI) cannot allocate additional memory for the meeting requests.
Addresses an issue that damages 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 that causes _NFS4SRV_FILE_CACHE_ENTRY and DirectoryCacheLock to stop responding and leads to error 9E.
Addresses an issue that prevents Server Message Block (SMB) Multichannel from working within a cluster network that has IPv6 Local-Link addresses.
Addresses an issue that might cause Storage Migration Service inventory operations on a Windows Server 2003 source computer to fail in clustered environments.
Addresses a timing issue that may cause stop error 0x27 in mrxsmb20!Smb2InvalidateFileInfoCacheEntry. This issue occurs when you rename or delete files that have certain extensions and are stored on a network share that has client-side caching enabled.
Addresses an issue in the Storage Migration Service that causes the Cutover stage to stop working during migration if an administrator assigns a static IP address to the source adapter.
Addresses an issue in which canceling a deduplication (dedup) job to rebuild hotspots prevents other deduplication PowerShell commands from responding.
Addresses an issue that might cause Remote Desktop sessions to disconnect because a leak in system memory occurs when the client window is minimized or maximized.
Addresses an issue that makes the Windows Defender Application Control’s Code Integrity-based events unreadable.
Addresses an issue with certificate validation that causes Internet Explorer mode on Microsoft Edge to fail.
Addresses an issue with syncing a device that prevents the device status from appearing on the mobile device management (MDM) server.

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.
Because of a bug, some customers who purchase a Windows 10 Pro Education device, may receive a genuine edition of Windows 10 Education. Windows 10 editions for education customers, Windows 10 Pro Education builds on the commercial version of Windows 10 Pro, and Windows 10 Education builds on Windows 10 Enterprise. This bug is not expected to introduce any negative experiences for customers. More information: Compare Windows 10 editions	A resolution for this issue will be released in a future servicing update that will prevent customers from entering this state.
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 (KB4538674) 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 4535996.

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.

February 27, 2020—KB4535996 (OS Builds 18362.693 and 18363.693)

Highlights

Improvements and fixes

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