Windows 10 2004/20H2: Update KB4586853

[German]Microsoft released the update KB4586853 for Windows 10 2004 and 20H2 on November 30, 2020. This optional update for Windows 10 fixes numerous bugs, including the Inplace Bug.


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A list of updates can be found on this Microsoft website. The update installation requires an existing current Servicing Stack Updates (SSUs). Meanwhile, Microsoft publishes an overview of current Servicing Stack Updates (SSUs) under ADV990001 (if it is not up to date, please check the Microsoft Update Catalog for Servicing Stack Updates).

Important: From July 2020 all Windows updates disable the RemoteFX vGPU features due to the CVE-2020-1036 vulnerability (see also KB4570006). After installing this update, attempts to start virtual machines (VM) with RemoteFX vGPU enabled will fail.

Microsoft had already tested the update KB4586853 with insiders (see Windows 10 Insider Preview 19042.662 KB4586853 for 20H2 fixes also Inplace Bug). Now blog reader EP pointed out, the the update is general released (thanks). 

Update KB4586853 for Windows 10 2004 and 20H2

Cumulative Update KB4586853 raises Windows 10 2004 to build 19041.662 and Windows 10 20H2 to build 19042.662. Here is the list of highlights specified by Microsoft:

  • Updates an issue that causes Narrator to stop responding after you unlock a device if Narrator was in use before you locked the device. 
  • Updates an issue that prevents you from finding certain Microsoft Xbox consoles on a Windows device. 
  • Updates an issue that fails to display the Microsoft Xbox Game Bar app controls on supported monitors. This issue occurs in certain Microsoft DirectX® 9.0 (DX9) games that are running with Variable Refresh Rate enabled on these monitors. 
  • Updates an issue with USB 3.0 hubs. A device connected to the hub might stop working when you set the device to hibernate or restart the device. 
  • Updates an issue that randomly changes the input focus of edit controls when using the Japanese IME or the Chinese Traditional IME. 
  • Updates an issue that makes the touch keyboard unstable in the Mail app. 
  • Improves the visual quality of Windows Mixed Reality headsets that run in lower resolution mode. 
  • Updates an issue that prevents the PDF24 app, version 9.1.1, from opening .txt files.

Here is the list of fixes made by the update:

  • Updates Internet Explorer’s About dialog to use the standard modern dialog. 
  • Addresses an issue that causes Narrator to stop responding after you unlock a device if Narrator was in use before you locked the device. 
  • Addresses an issue that fails to display the local account groups in the localized language even after you deploy the language pack. 
  • Addresses an issue that prevents a user from finding certain Microsoft Xbox consoles on a Windows device. 
  • Addresses an issue that displays a black screen to Windows Virtual Desktop (WVD) users when they attempt to sign in. 
  • Addresses an issue with a certain COM API that causes a memory leak. 
  • Addresses an issue that fails to display the Microsoft Xbox Game Bar app controls on supported monitors. This issue occurs in certain Microsoft DirectX® 9.0 (DX9) games that are running with Variable Refresh Rate enabled on these monitors. 
  • Addresses an issue that prevents the touch keyboard from opening in Universal Windows Platform (UWP) apps when USB devices are connected. 
  • Addresses an issue with USB 3.0 hubs. A device connected to the hub might stop working when you set the device to hibernate or restart the device. 
  • Addresses an issue that crops the touch keyboard when you use a Remote Desktop Connection on a device that has a different screen resolution. 
  • Addresses an issue with excessive network traffic that occurs when you use the Open File dialog box in File Explorer and browse to a shared folder that has the Previous Version feature available. 
  • Addresses an issue that causes the ImmGetCompositionString() function to return the full-width Hiragana when using the Microsoft Input Method Editor (IME) for Japanese instead of returning the half-width Katakana. 
  • Addresses an issue that prevents JumpList items from functioning. This occurs when you create them using the Windows Runtime (WinRT) Windows.UI.StartScreen API for desktop applications that are packaged in the MSIX format. 
  • Addresses an issue that prevents applications from receiving the Shift and Ctrl keystroke events when the Bopomofo, Changjie, or Quick Input Method Editors (IME) are in use. 
  • Addresses an issue that randomly changes the input focus of edit controls when using the Japanese IME or the Chinese Traditional IME. 
  • Addresses an issue that prevents you from signing in on certain servers. This occurs when you enable a Group Policy that forces the start of a computer session to be interactive. 
  • Addresses an issue that fails to set the desktop wallpaper as configured by a GPO when you specify the local background as a solid color. 
  • Addresses an issue with the Microsoft Pinyin IME that unexpectedly dismisses the candidate pane when you type certain phrases. 
  • Addresses an issue that fails to send the Shift keyup event to an application when you use the Japanese IME. 
  • Addresses an issue that renders Kaomoji incorrectly on the emoji panel. 
  • Addresses an issue that makes the touch keyboard unstable in the Mail app. 
  • Addresses an issue that enters unexpected characters, such as half-width Katakana, when you type a password while the IME is in Kana input mode. 
  • Addresses an issue that might fail to pair certain MIDI devices that connect using Bluetooth Low Energy (LE). 
  • Addresses a runtime error that causes Visual Basic 6.0 (VB6) to stop working when duplicate windows messages are sent to WindowProc()
  • Addresses an issue that generates a 0x57 error when the wecutil ss /c: command is used to update an Event Forwarding subscription. 
  • Addresses an issue that causes applications to fail when they call the LookupAccountSid() API. This occurs after migrating accounts to a new domain whose name is shorter than the name of the previous domain. 
  • Addresses an issue in which loading a Code Integrity Policy causes PowerShell to leak a large amount of memory. 
  • Addresses an issue that causes a system to stop working during startup. This occurs when the CrashOnAuditFail policy is set to 1 and command-line argument auditing is turned on. 
  • Addresses an issue that causes the Microsoft Management Console (MMC) Group Policy application to stop working when you are editing the Group Policy Security settings. The error message is, “MMC cannot initialize the snap-in.” 
  • Addresses an issue that fails to free a system’s non-paged pool and requires a restart of the system. This occurs when running 32-bit applications with the Federal Information Processing Standard (FIPS) mode enabled. 
  • Addresses an issue that might prevent updates from installing and generates an “E_UNEXPECTED” error. 
  • Addresses an issue that causes the “I forgot my Pin” functionality on the lock screen to fail. This failure occurs if the user has signed in using a username and password and the DontDisplayLastUserName or HideFastUserSwitching policy settings are enabled. 
  • Addresses an issue that prevents access to Azure Active Directory (AD) using the Google Chrome browser because of a Conditional Access policy error. 
  • Improves the visual quality of Windows Mixed Reality headsets that run in lower resolution mode. 
  • Extends Microsoft Defender for Endpoint support to new regions. 
  • Enables a new Hardware-enforced Stack Protection feature called shadow stacks on supported hardware. This update allows applications to opt in to user-mode shadow stack protection, which helps harden backward-edge control-flow integrity and prevents return-oriented programming-based attacks. 
  • Addresses an issue in the Microsoft Remote Procedure Call (RPC) runtime that causes the Distributed File System Replication (DFSR) service to stop responding. This issue generates log events for DFS Replication (5014), RPC (1726), and no reconnection (5004) for a default timeout of 24 hours with no replication. 
  • Adds the touch keyboard to the allowed apps list, and it now works in multi-app assigned access mode. 
  • Addresses an issue that prevents the PDF24 app, version 9.1.1, from opening .txt files. 
  • Addresses an issue that might cause a non-paged pool memory leak in some scenarios. 
  • Addresses an issue that allows an app that has been blocked from hydrating files to continue hydrating files in some cases. 
  • Addresses an issue that might cause a memory leak in bindflt.sys when copying files in a container scenario. 
  • Addresses an issue with Active Directory Certificate Services (AD CS) that fails to submit Certificate Transparency (CT) logs when they are enabled. 
  • Addresses an issue in which cluster validation tests internal switches that are not for cluster use and re-communication. 
  • Addresses an issue that causes stop error 0x27 when you attempt to sign in to a device that is not in a domain using credentials for a device that is in the domain.

The colleagues from deskmodder.de reported here that the in-place problem with the release preview variants has already been solved. With older builds of the Windows 10 20H2 it was not possible to perform an inplace upgrade without errors. This is the reinstallation of the operating system from a running Windows to repair it. Until now, no data and programs could be transferred during an in-place upgrade. But with the optional update KB4586853 this is possible again.


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This update is automatically downloaded and installed by Windows Update. This update is also available in the Microsoft Update Catalog, but not via WSUS. Microsoft strongly recommends that you install the latest Service Stack Update (SSU) KB4586864 for your operating system before you install the latest Cumulative Update (LCU) (actually the SSU should already be included in the Cumulative Update).

For the update, Microsoft indicates two problems. Users of the Microsoft Input Method Editor (IME) for Chinese and Japanese may receive an error, or the application may stop responding or close when they try to drag with the mouse. Also the certificate problem (see Windows-Updates with Fix for Kerberos-Authentication-Problem (11/19/2020)) is still present. Details can be found in KB4586853.

Microsoft has also released an update directly for the Windows Update Client to improve its reliability. This is rolled out outside of Windows Update if the machine is compatible and not an LTSC variant and updates were not blocked by GPO.

Similar articles:
Microsoft Office Patchday (November 3, 2020)
Microsoft Security Update Summary (November 10, 2020)
Patchday: Windows 10-Updates (November 10, 2020)
Patchday: Updates for Windows 7/Server 2008 R2 (Nov. 10, 2020)
Patchday: Windows 8.1/Server 2012-Updates (Nov. 10, 2020)
Patchday Microsoft Office Updates (November 10, 2020)


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2 Responses to Windows 10 2004/20H2: Update KB4586853

  1. Grisu_1968 says:

    Ich kann das KB4586853 derzeit nicht für ein ThinkPad X1 Carbon 6th Gen. Type 20KH empfehlen. Ein ordnungsgemäßes herunterfahren ist da mit dem KB4586853 nicht mehr möglich. Ich hab es wieder deinstalliert.

    Symptom wenn man Herunterfahren wählt: Der Einschaltknopf leuchtet dauerhaft und sollte die Tastaturbeleuchtung an sein leuchtet diese auch dauerhaft. Das Notebook kann nur durch langes drücken des Ein/Ausschaltknopfes Ausgeschaltet werden.

    Lösung: KB4586853 deinstallieren und warten bis ein Nachfolgeupdate von Microsoft veröffentlicht wird was keine Preview ist oder irgend welche Treiber von Lenovo neu erscheinen. Dieses Verhalten kann ich reproduzieren.

    Mit Windows 10 20H2 Build: 19042.631 Ist ein Herunterfahren problemlos möglich. Sobald KB4586853 installiert ist und man Windows 10 20H2 Build: 19042.632 hat ist ein ordnungsgemäßes Herunterfahren nicht mehr möglich.


    English translation by G. Born

    Currently I cannot use KB4586853 for a ThinkPad X1 Carbon 6th Gen. Type 20KH. A proper shutdown with KB4586853 installed is no longer possible. I have uninstalled it again.

    Symptom if you choose shutdown: The power button lights up permanently and if the keyboard light is on, it lights up permanently. The notebook can only be switched off by pressing the on/off button for a long time.

    Solution: Uninstall KB4586853 and wait until a follow-up update from Microsoft is released which is not a preview or any new driver from Lenovo is released. I can reproduce this behaviour.

    With Windows 10 20H2 Build: 19042.631 a shutdown is possible without problems. Once KB4586853 is installed and you have Windows 10 20H2 Build: 19042.632, a proper shutdown is no longer possible.

    • EP says:

      problem with KB4586853 seems to be limited to certain Lenovo Thinkpad laptops only.

      I do NOT encounter the shutdown problem with build 19042.662 on a Toshiba laptop as everything turns off correctly, including any keyboard lights. I even use the command “shutdown.exe -s” (from the cmd.exe prompt) to do a full shutdown instead of using the shutdown menu option.

      So I have no problems with the KB4586853 update

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