UPDATE 2/9: KB4601319 CU Windows 10 v2004 build 19041.804 and v20H2 19042.804

February 2, 2021 - KB4598291 (OS Builds 19041.789 and 19042.789) Preview

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11/17/20
For information about Windows update terminology, see the article about the types of Windows updates and the monthly quality update types. To view other notes and messages, see the Windows 10, version 2004 update history home page.
Note Follow @WindowsUpdate to find out when new content is published to the release information dashboard.

Highlights

• Updates an issue that causes a device to stop responding when you play a game in full-screen or tablet mode.
• Updates an issue with using Ctrl+Caps Lock and Alt+Caps Lock to switch to Hiragana or Katakana mode respectively after upgrading to Windows 10, version 2004.
• Updates an issue that prevents you from opening a document that is on the Windows desktop.
• Updates an issue that creates duplicate cloud provider folders in the File Explorer navigation pane.
• Updates an issue with some special key combinations used in DaYi, Yi, and Array IMEs that might cause an application to stop working.
• Updates an issue that displays a blank lock screen after a device wakes up from Hibernate.
• Corrects historical daylight savings time (DST) information for the Palestinian Authority.
• Updates an issue that incorrectly deactivates some Windows 10 Education devices after upgrading to Windows 10, version 2004.
• Updates an issue that might cause the Alt+Tab order to change unexpectedly and cause you to switch to the wrong window.
• Updates an issue that fails to show Extract all on the shortcut menu when you right-click an online-only ZIP file.

Improvements and fixes

Note: To view the list of KB articles, click the OS name to expand the collapsible section.

Windows 10, version 20H2

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

• This build includes all the improvements from Windows 10, version 2004.
• Addresses an issue that might cause the Alt+Tab order to change unexpectedly and cause you to switch to the wrong window.

Windows 10, version 2004

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

• Updates the default values for the following Internet Explorer registry keys:
  
  • svcKBFWLink = “ ” (empty string)
  • svcKBNumber = “ ” (empty string)
  • svcUpdateVersion = 11.0.1000.

In addition, these values will no longer be updated automatically.

• Enables administrators to disable standalone Internet Explorer using a Group Policy while continuing to use Microsoft Edge's IE Mode.
• Enables you to configure certain policies that support Microsoft Edge IE Mode using mobile device management (MDM).
• Addresses an issue in the Universal C Run-time Library (UCRT) that causes printf() to incorrectly round floating point values.
• Addresses an issue that displays a User Account Control (UAC) dialog box unexpectedly when you turn on speech recognition.
• Addresses an issue that fails to notify the target application when you select the Copy link command on the Share menu.
• Addresses an issue that causes the 64-bit fmod() and remainder() functions to damage the Floating Point Unit (FPU) stack.
• Addresses an issue that causes a stop error or causes a device to stop responding when you play a game in full-screen or tablet mode.
• Addresses an issue with using Ctrl+Caps Lock and Alt+Caps Lock to switch to Hiragana or Katakana mode respectively after upgrading to Windows 10, version 2004.
• Addresses an issue that prevents you from opening a document that is on the Windows desktop and generates the error, “The directory name is invalid.” This issue occurs after changing the desktop location in the Location tab of the Desktop Properties dialog box (File Explorer > This PC > Desktop).
• Addresses an issue that creates duplicate cloud provider folders in the File Explorer navigation pane.
• Addresses an issue that occurs when the Mandatory Profile check box is selected when you copy a user profile.
• Addresses an issue that prevents ImmGetCompositionString() from returning the white space for furigana when using the Japanese Input Method Editor (IME).
• Addresses an issue with some special key combinations used in DaYi, Yi, and Array IMEs that might cause an application to stop working.
• Addresses an issue that displays a blank lock screen after a device wakes up from Hibernate.
• Corrects historical daylight savings time (DST) information for the Palestinian Authority.
• Adds support for serial number control using the registry.
• Addresses an issue that incorrectly deactivates some Windows 10 Education devices after upgrading to Windows 10, version 2004.
• Addresses an issue that causes the upload of diagnostic logs to a management service, such as Microsoft Intune, to fail. The failure occurs because of a network time-out on a slow network.
• Displays a notification to a user when an administrator signs in to an MDM service, such as Microsoft Intune, to find the location of a managed device.
• Addresses an issue that prevents users from using their smart card credentials when the user hint is the domain credential name (domain\username).
• Addresses an issue in which using local Service for User (S4U) affects Data Protection API (DPAPI) credential keys and causes users to sign out unexpectedly.
• Addresses an issue that causes the silent mode deployment of BitLocker to fail with the error 0x80310001. This issue occurs when deploying BitLocker encryption to Hybrid Azure Active Directory (Azure AD) joined devices.
• Addresses an issue that might cause a black screen to appear or delay signing in to Hybrid Azure Active Directory joined machines. Additionally, there is no access to login.microsoftonline.com.
• Addresses an issue that might cause systems that use BitLocker to stop working with the error 0x120 (BITLOCKER_FATAL_ERROR).
• Addresses an issue that causes a device to stop working when deploying Microsoft Endpoint Configuration Manager if AppLocker is enabled on the device.
• Addresses an issue that cause the LSASS.exe process to leak memory on a server that is under a heavy authentication load when Kerberos Armoring (Flexible Authentication Secure Tunneling (FAST)) is enabled.
• Addresses an issue that causes LSASS.exe to stop working because of a race condition that results in a double free error in Schannel. The exception code is c0000374, and the Event Log displays Schannel event 36888, fatal error code 20, and error state 960. This issue occurs after installing Windows updates from September 2020 and later.
• Addresses a memory leak issue that occurs when you authenticate a client certificate on servers that are configured as domain controllers.
• Addresses an issue with Virtual Interrupt Notification Assert (VINA) interrupts.
• Addresses an issue with HTTP caching that interferes with kiosk mode that targets Azure AD groups.
• Addresses an issue that occurs when a Volume Shadow Copy Service (VSS) snapshot triggers on virtual machines (VM) that contain Resilient File System (ReFS) volumes. The triggered VSS snapshot fails with a time-out and prevents access to the ReFS volume for 30 minutes.
• Addresses an issue that incorrectly logs Extensible Storage Engine Technology (ESENT) event 642 in the Application Event Log.
• Addresses an issue with Administrative Template settings you configure using a Group Policy Object (GPO). When you change the value of the policy settings to NOT CONFIGURED, the system fails to remove the previous settings. This issue is most noticeable with roaming user profiles.
• Addresses an issue that might cause a deadlock in Windows Virtual Desktop when a user disconnects before a driver fully loads.
• Addresses an issue that fails to show Extract all on the shortcut menu when you right-click an online-only ZIP file.
• Updates the process for enrolling in online speech recognition. If you are already enrolled, you will see a message that asks you to review the new settings. If you choose not to contribute your speech data for human review, you can still use online speech recognition. The new settings contain one button to turn on online speech recognition and another button that turns on the collection of your voice clips. If you turn on the collection of your voice clips, you can turn it off at any time using the same button in the new settings page.
• Addresses an issue that prevents the Start menu, Cortana, and tiles pinned to the Taskbar from opening. This issue occurs when an administrator copies an existing profile that has the Mandatory Profile check box selected.

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

Symptoms	Workaround
System and user certificates might be lost when updating a device from Windows 10, version 1809 or later to a later version of Windows 10. Devices will only be impacted if they have already installed any Latest cumulative update (LCU) released September 16, 2020 or later and then proceed to update to a later version of Windows 10 from media or an installation source which does not have an LCU released October 13, 2020 or later integrated. This primarily happens when managed devices are updated using outdated bundles or media through an update management tool such as Windows Server Update Services (WSUS) or Microsoft Endpoint Configuration Manager. This might also happen when using outdated physical media or ISO images that do not have the latest updates integrated. Note Devices using Windows Update for Business or that connect directly to Windows Update are not impacted. Any device connecting to Windows Update should always receive the latest versions of the feature update, including the latest LCU, without any extra steps.	If you have already encountered this issue on your device, you can mitigate it within the uninstall window by going back to your previous version of Windows using the instructions here. The uninstall window might be 10 or 30 days depending on the configuration of your environment and the version you’re updating to. You will then need to update to the later version of Windows 10 after the issue is resolved in your environment. Note Within the uninstall window, you can increase the number of days you have to go back to your previous version of Windows 10 by using the DISM command /Set-OSUninstallWindow. You must make this change before the default uninstall window has lapsed. For more information, see DISM operating system uninstall command-line options. We are working on a resolution and will provide updated bundles and refreshed media in the coming weeks.
When using the Microsoft Japanese Input Method Editor (IME) to enter Kanji characters in an app that automatically allows the input of Furigana characters, you might not get the correct Furigana characters. You might need to enter the Furigana characters manually. Note The affected apps are using the ImmGetCompositionString() function.	We are working on a resolution and will provide an update in an upcoming release.

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 (KB4598481) 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)	No	You can import this update into WSUS manually. See the Microsoft Update Catalog for instructions.

File information

For a list of the files that are provided in this update, download the file information for cumulative update 4598291.

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.

Source: https://support.microsoft.com/en-us/...c-58bdc3ca5e3b

See also: https://techcommunity.microsoft.com/...ce/ba-p/222376


Direct download links for KB4598291 MSU file from Microsoft Update Catalog:

Download KB4598291 MSU for Windows 10 v2004 and v20H2 32-bit (x86) - 140.8 MB

Download KB4598291 MSU for Windows 10 v2004 and v20H2 64-bit (x64) - 415.3 MB

Download KB4598291 MSU for Windows 10 v2004 and v20H2 ARM64 - 469.8 MB

The KB4562830 Enablement Package allows you to go from build 19041 (v2004) to 19042 (v20H2).

Posted By: Brink
21 Jan 2021