KB4598242 CU Windows 10 v2004 build 19041.746 and v20H2 19042.746 Win Update

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    KB4598242 CU Windows 10 v2004 build 19041.746 and v20H2 19042.746

    KB4598242 CU Windows 10 v2004 build 19041.746 and v20H2 19042.746

    Cumulative Update - January 12
    Category: Win Update
    Last Updated: 02 Feb 2021 at 16:57
    UPDATE 2/2: KB4598291 CU Windows 10 v2004 build 19041.789 and v20H2 19042.789

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



    January 12, 2021 - KB4598242 (OS Builds 19041.746 and 19042.746)

    Applies to: Windows 10 version 2004 all editions, Windows Server version 2004, Windows 10 version 20H2 all editions, Windows Server version 20H2 all editions

    UPDATED 1/12/21
    REMINDER Adobe Flash Player went out of support on December 31, 2020. For more information, see Adobe Flash end of support on December 31, 2020. Flash content will be blocked from running in Flash Player beginning January 12, 2021. For more information, see Adobe Flash Player EOL General Information Page.


    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 to improve security when using external devices, such as game controllers, printers, and web cameras.
    • Updates to improve security when Windows performs basic operations.

    Improvements and fixes

    Windows 10, version 20H2

    This security update includes quality improvements. Key changes include:

    • This build includes all the improvements from Windows 10, version 2004.
    • No additional issues were documented for this release.

    Windows 10, version 2004

    Note This release also contains updates for Microsoft HoloLens (OS Build 19041.1134) released January 12, 2021. Microsoft will release an update directly to the Windows Update Client to improve Windows Update reliability on Microsoft HoloLens that have not updated to this most recent OS Build.

    This security update includes quality improvements. Key changes include:

    • Addresses a security vulnerability issue with HTTPS-based intranet servers. After installing this update, HTTPS-based intranet servers cannot, by default, use a user proxy to detect updates. Scans using these servers will fail if you have not configured a system proxy on the clients. If you must use a user proxy, you must configure the behavior using the policy “Allow user proxy to be used as a fallback if detection using system proxy fails.” To ensure the highest levels of security, also use Windows Server Update Services (WSUS) Transport Layer Security (TLS) certificate pinning on all devices. This change does not affect customers who are using HTTP WSUS servers. For more information, see Changes to scans, improved security for Windows devices.
    • Addresses a security bypass vulnerability that exists in the way the Printer Remote Procedure Call (RPC) binding handles authentication for the remote Winspool interface. For more information, see KB4599464.
    • Security updates to Windows App Platform and Frameworks, Windows Media, Windows Fundamentals, Windows Kernel, Windows Cryptography, Windows Virtualization, Windows Peripherals, and Windows Hybrid Storage Services.

    If you installed earlier updates, only the new fixes contained in this package will be downloaded and installed on your device.

    For more information about the resolved security vulnerabilities, please refer to the new Security Update Guide website.

    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
    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 and applying Microsoft security fixes. 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.

    Release Channel Available Next Step
    Windows Update and Microsoft Update Yes None. This update will be downloaded and installed automatically from Windows 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: Security Updates

    File information

    For a list of the files that are provided in this update, download the file information for cumulative update 4598242.

    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/...date-kb4598242

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


    Direct download links for KB4598242 MSU file from Microsoft Update Catalog:

    Download KB4598242 MSU for Windows 10 v2004 and v20H2 32-bit (x86) - 131.4 MB

    Download KB4598242 MSU for Windows 10 v2004 and v20H2 64-bit (x64) - 401.3 MB

    Download KB4598242 MSU for Windows 10 v2004 and v20H2 ARM64 - 451.6 MB
    Brink's Avatar Posted By:

  1. Brink's Avatar
    Posts : 58,442
    64-bit Windows 11 Pro for Workstations
       #1

    KB4598242 CU Windows 10 v2004 build 19041.746 and v20H2 19042.746-kb4598242.jpg
      My Computers

  2. IronZorg89's Avatar
    Posts : 2,473
    Windows 10 pro x64-bit
       #2

    Downloading it right now:

    KB4598242 CU Windows 10 v2004 build 19041.746 and v20H2 19042.746-installing-kb4598242.png
      My Computers

  3. Josey Wales's Avatar
    Posts : 25,182
    Windows 11 Pro 22000.100
       #3

    KB4598242 CU Windows 10 v2004 build 19041.746 and v20H2 19042.746-capture.png
      My Computer

  4. CountMike's Avatar
    Posts : 18,860
    W10+Developer Insider + Linux
       #4

    KB4598242 CU Windows 10 v2004 build 19041.746 and v20H2 19042.746-image.png
      My Computers

  5. thomaseg1's Avatar
    Posts : 13,268
    Windows 10 Pro (x64) 20H2 19042.804 & 21327.1000
       #5

    KB4598242 CU Windows 10 v2004 build 19041.746 and v20H2 19042.746-image.png
      My Computers

  6. Ghot's Avatar
    Posts : 11,437
    Win 10 Home 10.0.19043.1110 (x64) [21H1]
       #6

    Just finished the update, (thru WAU Manager), it gave me two of them...
    KB4598242 and KB4598481

    Total time approx. 20 mins.



    KB4598242 CU Windows 10 v2004 build 19041.746 and v20H2 19042.746-image1.png
      My Computer


  7. Posts : 499
    Windows 11 Pro 21H2 Build 22000.71
       #7

    Updated via WU. So far, so good.
      My Computers

  8. RingTailCoon's Avatar
    Posts : 1,388
    Windows 10 HOME 64-BIT
       #8

    First batch of 2021! Here we gooooo.........
    Attached Thumbnails Attached Thumbnails KB4598242 CU Windows 10 v2004 build 19041.746 and v20H2 19042.746-untitled-1.jpg  
      My Computer


  9. Posts : 183
    Windows 10 Pro x64 20H2 build 19042.804
       #9

    no problems installing.

    KB4598242 CU Windows 10 v2004 build 19041.746 and v20H2 19042.746-winver.png
      My Computer


 
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