KB4571744 for Windows 10 2004 Build 19041.488

Microsoft releases today a new non-security patch for Windows 10 2004 users i.e. KB4571744. Besides increasing the OS Build number to 19041.488, this cumulative update brings lots of quality improvements and fixes. 

Windows 10 20H2 ISO file is now available for commercial users as well so as to validate this pre-release. Let’s explore the key changes in detail –

KB4571744 Changelog

The key highlights of today’s build 19041.488 for Windows 10 2004 are as follows –

KB4571744 - Build 19041.488

Note: Since Windows 10 version 20H1 and 20H2 includes the same core features, these fixes apply to version 2009 as well. Besides, KB4571744 upgrades Windows 10 20H2 to Build 19042.487.

Improvements and Fixes

  • Fixes an issue with a blurry sign in screen.

  • Works to solve a bug that causes a system to stop working and generates a 7E stop code.

  • Addresses an issue that causes applications to take a long time to open.

  • Fixes classification failures caused by the wrong User Principal Name (UPN).

  • Solves an issue in cluster scenarios that causes handles to .vmcx and .vmrs files to become invalid after storage failover. As a result, live migration and other virtual machine (VM) maintenance activities fail with STATUS_UNEXPECTED_NETWORK_ERROR.

  • Resolves an issue with pinned Add-ins that cause Microsoft Outlook to become unresponsive.

  • Provides the ability to sync the Microsoft Edge IE Mode unidirectional session cookie when an administrator configures the session cookie.

  • Fixes an issue with rendering PeerDist-encoded content in Internet Explorer and Microsoft Edge.

  • Addresses an issue that might prevent ActiveX content from loading.

  • Fixes an issue that displays a black screen to Windows Virtual Desktop (WVD) users when they attempt to sign in.

  • Fixes an issue that might cause apps that use the custom text wrapping function to stop working in certain scenarios.

  • Resolves an issue with Start menu apps and tiles in virtual desktop infrastructure (VDI) environments. The issue occurs after you sign in to the VDI environment a second time and use a Remote Desktop User Profile Disk in a non-persistent virtual desktop pool.

  • Works upon an issue that generates an error when printing to a document repository.

  • Resolves an issue that prevents Visual Basic 6.0 (VB6) applications from using ListView in OCX after upgrading to Windows 10, version 1903 and later.

  • We fixed a runtime error that causes VB6 to stop working when duplicate windows messages are sent to WindowProc().

  • Fixes an issue that causes a stop error when the initialization of the graphics adapter fails.

  • Resolves an issue to reduce the likelihood of missing fonts.

  • Addresses an issue that prevents users from reducing the size of a window in some cases.

  • Fixes an issue that truncates a potential list of characters (candidates) when you type characters in the Simplified Chinese (Pinyin) input method editor (IME). When this happens, Chinese characters do not appear.

  • Resolves an issue that prevents the first key stroke from being recognized correctly in the DataGridView

  • Fixes an issue that causes an application that uses dll to stop working, and the 0xc0000005 (Access violation) exception appears.

  • Rectifies an anomaly with Dynamic Data Exchange (DDE) that causes a memory leak when multiple clients connect to the same server.

  • Solves an issue that prevents Cortana Smart lighting from working as expected if you shut down the machine while Fast Shutdown is enabled.

  • Provides the ability for Dolby Atmos for Headphones and DTS Headphone: X to be used in 24-bit mode on devices that support 24-bit audio.

  • Fixes an issue that prevents the IME user dictionary from being used when leveraging folder redirection with user profiles.

  • Works upon an issue that causes a memory leak in the exe process when the server is under a heavy authentication load and Credential Guard is enabled.

  • Fixes 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.

  • Resolves an issue that prevents hash signing from working correctly when using the Microsoft Platform Crypto Provider for Trusted Platform Modules (TPM). This issue might also affect networking software, such as virtual private network (VPN) applications.

  • Focuses an issue that causes Microsoft Office applications to close unexpectedly when using a Korean IME.

  • Fixes an issue that displays incorrect folder properties in File Explorer when the path is longer than MAX_PATH.

  • Solves an issue with Windows Update becoming unresponsive when checking for updates.

  • Resolves an issue that prevents the correct lock screen from appearing when the following policies are set:

    • Policy “Interactive Logon: Do not require Ctrl+Alt+Del” set to “Disabled”
    • HKLM\SOFRWARE\Policies\Microsoft\Windows\System
    • DisableLockScreenAppNotifications = 1
    • DisableLogonBackgroundImage = 1
  • Improves an issue that causes File Explorer to stop working when you browse directories of raw images and other file types.

  • Improves the tablet experience for convertible or hybrid devices in docked scenarios.

  • Updates the time zone information for the Yukon, Canada.

  • Improves the user experience of the Windows Hello enrollment pages for face and fingerprint setup.

  • Prevents accounts from a different tenant from signing in to a Surface Hub device.

  • Fixes a stop error 0xC2 in sys.

  • Solves a bug that might cause stop error 7E in sys on servers running the Network File System (NFS) service.

  • Fixes an issue that causes the Event Viewer Microsoft Management Console (MMC) to stop working when the secondary monitor is above the primary monitor. An out of bounds exception appears.

  • Fixes an issue that prevents the migration of the Windows Remote Management (WinRM) service startup type.

  • Prevents apps from downloading an update or opening in certain scenarios.

  • Resolves a BSOD Error during 0xC00002E3 at startup. This issue occurs after installing certain Windows Updates that were released on or after April 21, 2020.

  • Resolves an issue with object performance counters.

  • We have fixed 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.

  • Resolves an issue that prevents users from setting the REG_EXPAND_SZkeys in some automated scenarios.

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

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

  • Resolves an issue that causes AOVPN user tunnels to use an incorrect certificate.

  • Earlier when users and device tunnels remain connected to the same endpoint, this results in an AOVPN issue. Microsoft fixes this bug as well.

  • Addresses an issue with the EnhancedAppLayerSecurity node in modern device management (MDM) that prevents its setting from being applied correctly to client devices.

  • Migrating an issues that continues to display the previous username hint in the smart card sign in box after a different user has used the machine with domain credentials.

  • We have fixed an issue that causes communication with the TPM to time out and fail.

  • We have fixed an issue that sometimes prevents AppLocker from running an application whose publisher rule allows it to run.

  • Microsoft fixed an issue in which AppLocker publisher rules might sometimes prevent applications from loading software modules; this can cause partial application failure.

  • We have fixed an issue that causes the promotion of a server to a domain controller to fail. This occurs when the Local Security Authority Subsystem Service (LSASS) process is set as Protected Process Light (PPL).

  • We have fixed an issue that prevents you from unlocking a device if you typed a space before the username when you first signed in to the device.

  • Resolves an issue that causes SMB to incorrectly use the original, cached non-Continuous Available handle to a file. This handle becomes invalid after a network error or storage failover. As a result, applications fail with errors such as STATUS_UNEXPECTED_NETWORK_ERROR.

  • Fixes an issue that causes the loss of written data when an application opens a file and writes to the end of the file in a share folder.

  • Mitigates wean issue with some apps, such as Microsoft Excel, that occurs when using the Microsoft Input Method Editor (IME) for Chinese and Japanese languages. You might receive an error, or the app might stop responding or close when you attempt to drag using the mouse.

  • Resolves an issue with interrupt targeting that might cause an interrupt to arrive at an incorrect processor.

  • Fixes an issue that causes delays during shutdown when running the Microsoft Keyboard Filter Service.

  • Fixes an issue that causes a machine to request a new IP address after authentication.

  • Improves an issue that causes the Background Intelligent Transfer Service (BITS) to download data while a device is in cellular mode without explicit user permission.

  • Prevents Always On VPN (AOVPN) from automatically reconnecting when resuming from Sleep or Hibernate.

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

  • Adds an unwanted keyboard layout as the default after an upgrade or migration even if you have already removed the layout.

  • Prevents applications from closing even though programming code directs them to close.

  • Fixes an issue that causes VPN apps to stop working in some cases when they attempt to enumerate VPN profiles.

  • Fixes an issue that causes the Optimize Drives dialog to incorrectly report that previously optimized drives need to be optimized again.

  • Addresses an issue that fails to turn off the host memory buffer (HMB) when you force the shutdown of a device. As a result, solid-state drives (SSDs) do not delete HMB contents.

  • Works upon an issue with Server Message Block (SMB). This issue incorrectly logs the Microsoft-Windows-SMBClient 31013 event in the Microsoft-Windows-SMBClient/Security event log of an SMB client when an SMB server returns STATUS_USER_SESSION_DELETED. Moreover, this issue occurs when SMB client users or applications open multiple SMB sessions using the same set of Transmission Control Protocol (TCP) connections on the same SMB Server. This issue most likely occurs on Remote Desktop Servers.

How to Get this Update

Note: First of all, download and install SSU KB4570334 so that the update process completes successfully.

As usual, users may get the KB4571744 non-security patch via two ways. They are –

  1. Windows Update: Head over to Settings > Update & Security > Windows Update and click the “Check for Updates” button. 
  2. Microsoft Update Catalog: If you don’t get this cumulative update via following the above guideline, manually download and install this file on the Update Catalog.

Note: Windows 10 2004 users would not get this patch via WSUS. However, they may manually import following these simple instructions.

Release Note: Update Catalog

Tip: If you are facing update, activation, or driver issues on your Windows PC, try RESTORO PC Repair Tool. This software will scan your device for potential issues and resolve them automatically.