Windows 10: KB4601556 Cumulative Update .NET Framework 3.5 and 4.8 for Windows 10

Discus and support KB4601556 Cumulative Update .NET Framework 3.5 and 4.8 for Windows 10 in Windows 10 News to solve the problem; May 11, 2021 - KB4601556 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10, version 1909, and Windows Server, version 1909 Release Date:... Discussion in 'Windows 10 News' started by Brink, May 12, 2021.

  1. Brink Win User

    KB4601556 Cumulative Update .NET Framework 3.5 and 4.8 for Windows 10


    May 11, 2021 - KB4601556 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10, version 1909, and Windows Server, version 1909

    Release Date:
    May 11, 2021

    Version:
    .NET Framework 3.5 and 4.8

    The May 11, 2021 update for Windows 10, version 1909, and Windows Server, version 1909 includes cumulative reliability improvements in .NET Framework 3.5 and 4.8. We recommend that you apply this update as part of your regular maintenance routines. Before you install this update, see the Prerequsites and Restart requirement sections.

    Quality and reliability improvements

    CLR1 - Addresses an issue where the entire process would be torn down when a NullReferenceException propagated out of an exception filter.
    - Addresses an issue with slowdowns that could occur when making large numbers of devirtualized calls into MarshalByRefObject-derived code. WPF2 - Addresses an issue with lag responding to typing in TextBox, when spell-checking is enabled that was introduced in an update earlier this year.
    - Addresses an issue with a leak of touch-related resources, including OS handles, when closing a window. The leak only occurs when a touch device is active, and only for windows whose HwndSource is created directly by the app.
    - Addresses a crash when docking a window within Visual Studio, or, more generally, disposing an HwndSource whose RootVisual is null. Winforms - Addresses an issue in ComboBox drop down item bounding rectangle as exposed to the accessibility tools, where we did not take into account that some items might be scrolled out of view, we had always started counting items from the first visible one, and thus item rectangle location was incorrect.
    - Implemented ScrollItemPattern (IScrollItemProvider (uiautomationcore.h) - Win32 apps | Microsoft Docs) for ComboBox drop down items. 1 Common Language Runtime (CLR)
    2 Windows Presentation Foundation (WPF)

    How to get this update

    Install this update

    Release Channel Available Next Step Windows Update and Microsoft Update Yes To download and install this update, go to Settings > Update & Security > Windows Update, and then select Check for updates. 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 1909, and Windows Server, version 1909
    Classification: Updates
    File information

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

    Prerequisites

    To apply this update, you must have .NET Framework 3.5 or 4.8 installed.

    Restart requirement

    You must restart the computer after you apply this update if any affected files are being used. We recommend that you exit all .NET Framework-based applications before you apply this update.

    How to obtain help and support for this update


    Known issues in this update

    Microsoft is not currently aware of any issues in this update.


    Source: https://support.microsoft.com/en-us/...f-ad9e32cbb40f

    Direct download links for KB4601556 MSU file from Microsoft Update Catalog:

    Download KB4601556 MSU for Windows 10 v1909 32-bit (x86) - 44.3 MB

    Download KB4601556 MSU for Windows 10 v1909 64-bit (x64) - 76.7 MB

    Download KB4601556 MSU for Windows 10 v1909 - 44.3 MB

    :)
     
    Brink, May 12, 2021
    #1
  2. Brink Win User

    KB4601556 Cumulative Update .NET Framework 3.5 and 4.8 for Windows 10

    Source: https://support.microsoft.com/en-us/...f-ad9e32cbb40f

    See also: https://devblogs.microsoft.com/dotne...net-framework/


    Direct download links for KB4601556 MSU file from Microsoft Update Catalog:

    Download KB4601556 MSU for Windows 10 v1909 32-bit (x86) - 44.3 MB

    Download KB4601556 MSU for Windows 10 v1909 64-bit (x64) - 76.7 MB

    Download KB4601556 MSU for Windows 10 v1909 - 44.3 MB
     
    Brink, May 12, 2021
    #2
  3. Brink Win User
    Brink, May 12, 2021
    #3
  4. Try3 Win User

    KB4601556 Cumulative Update .NET Framework 3.5 and 4.8 for Windows 10

    KB4586876 Cumulative Update .NET Framework 3.5, 4.8 Windows 10 Jan. 12 Win Update

    Phil,

    This might all be pretty confusing now.

    I suggest

    1 Turn on updates for other MS products - my post #22
    2 Run WU to see if it now shows that KB4586876 .Net update as being required

    3.1 If WU lists it then install it.
    4.1 If it installs and there are no remaining problems, stick the kettle on.

    3.2 If WU still does not list it then use that .Net fixer tutorial I gave you a link to - my post #18
    4.2 If the problem defies the fixer tool then study the Ghot guidance in that other thread I gave you a link to [ - my post #18] and consider Ghot's suggestion of re-installing the runtime [his post #21].
    5.2 If it refuses to install, try reinstalling v3.5 - Install .Net Framework 3.5 - TenForumsTutorials The update is for both 3.5 & 4.8 but I suppose there's a chance that reinstalling 3.5 would give something a kick up the pants enough to get it all working.
    6.2 If it still won't play, consider unloading then reloading both .Net entries in CP, P&F, Turn Windows features on & off. We used to do that for WMP in Windows 7 so it is a pretty well-established method but I have not seen anybody apply it to .Net entries before so you might want to discuss it further before doing anything about it.

    Best of luck,
    Denis

    12:29 - I have now finished fiddling with this post.
     
Thema:

KB4601556 Cumulative Update .NET Framework 3.5 and 4.8 for Windows 10

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