KB5004331 Cumulative Update .NET Framework 3.5 and 4.8 for Windows 10 Win Update

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    KB5004331 Cumulative Update .NET Framework 3.5 and 4.8 for Windows 10

    KB5004331 Cumulative Update .NET Framework 3.5 and 4.8 for Windows 10

    Cumulative Update Preview for Windows 10 version 2004, 20H2, and 20H1 - August 10
    Category: Win Update
    Last Updated: 10 Aug 2021 at 12:55
    August 10, 2021 - KB5004331 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10, version 2004, Windows Server, version 2004, Windows 10, version 20H2, and Windows Server, version 20H2, and Windows Version 21H1

    The August 10, 2021 update for Windows 10, version 2004, Windows Server, version 2004, Windows 10, version 20H2, and Windows Server, version 20H2, and Windows Version 21H1 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 Prerequisites and Restart requirement sections.

    Summary

    Security improvements

    There are no new security improvements in this release. This update is cumulative and contains all previously released security improvements.

    Quality and reliability improvements

    CLR1 - In scenarios with both high numbers of assemblies and high numbers of GC heaps, Server GC can encounter serious lock contention during generation 2 GCs. A config switch has been introduced as a workaround. It can either be enabled from a .config file:

    <configuration>
    <runtime>
    <GCStaticsNoLock enabled="true"/>
    </runtime>
    </configuration>

    Or by setting environment variable COMPLUS_GCStaticsNoLockto a non-zero value. If the config switch is not enabled, behavior is unchanged compared to previous versions.
    Winforms - Addresses an issue where some Windows Forms applications that use ToolStrip controls with ToolStripControlHost, and run under UIA Accessibility Tools, could make Accessibility Tools unresponsive.
    - Addresses a regression in the ComboBox item accessible object where Accessibility Tools was not able to distinguish between identical items in the ComboBox and was becoming unresponsive.
    1 Common Language Runtime (CLR)

    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) 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.

    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/...4-c04f55cd1d08

    See also: https://devblogs.microsoft.com/dotne...pdate-preview/


    Direct download links for KB5004331 MSU file from Microsoft Update Catalog:

    Download KB5004331 MSU for Windows 10 v2004, v20H2, and v21H1 32-bit (x86) - 41.8 MB

    Download KB5004331 MSU for Windows 10 v2004, v20H2, and v21H1 64-bit (x64) - 65.4 MB

    Download KB5004331 MSU for Windows 10 v2004, v20H2, and v21H1 ARM64 - 41.8 MB
    Brink's Avatar Posted By:

  1. Brink's Avatar
    Posts : 59,077
    64-bit Windows 11 Pro for Workstations
       #1

    KB5004331 Cumulative Update .NET Framework 3.5 and 4.8 for Windows 10-kb5004331.jpg
      My Computers

  2. Dav's Avatar
    Dav
    Posts : 91
    Windows 10 Pro X64
       #2

    Thanks again Shawn!!
    I installed this also on 3 laptops with no issues.
    Dav
      My Computers

  3. Stigg's Avatar
    Posts : 471
    Windows 10 Pro
       #3

    Why do they call it "Preview"?
      My Computer

  4. RingTailCoon's Avatar
    Posts : 1,420
    Windows 10 HOME 64-BIT
       #4

    That......... was a faaaaaaaaaaaaaaast update! Short 'n sweet!
      My Computer

  5. pipmeister's Avatar
    Posts : 78
    Windows 10 Home 64 bit 21H1 (19043.1110)
       #5

    Stigg said:
    Why do they call it "Preview"?

    ^ ^ ^ ^ ^ ^ ^ ^

    What Stigg asked?

    Mine was dumped / forced on me with no option not to install it!

    Err, anybody?

    Pip
      My Computers

  6. Stigg's Avatar
    Posts : 471
    Windows 10 Pro
       #6

    pipmeister said:
    ^ ^ ^ ^ ^ ^ ^ ^

    What Stigg asked?

    Mine was dumped / forced on me with no option not to install it!

    Err, anybody?

    Pip
    ^ ^ ^ ^ ^ ^ ^ ^

    What Pip asked.

    My guess is that I don't think anyone really knows outside of Microsoft headquarters.
      My Computer

  7. pipmeister's Avatar
    Posts : 78
    Windows 10 Home 64 bit 21H1 (19043.1110)
       #7

    Stigg said:
    ^ ^ ^ ^ ^ ^ ^ ^

    What Pip asked.

    My guess is that I don't think anyone really knows outside of Microsoft headquarters.
    It is curious by the inconsistency. This Preview differs from my previous experience; i.e. I usually have the choice whether to install a Preview or not. This gave me no choice, and was installed along with my Windows Defender Updates.

    It's interesting to note that KB5004296 Windows 10 2004 19041.1151, 20H2 19042.1151, 21H1 19043.1151 Cumulative Update Preview - July 29 2021, does indeed give me the choice, which is just as well as there appears to be problems for some members.

    KB5004331 Cumulative Update .NET Framework 3.5 and 4.8 for Windows 10-kb5004296.jpg


    I've linked this to page 3, as that has a few gremlins and issues that members have reported:

    KB5004296 Windows 10 2004 19041.1151, 20H2 19042.1151, 21H1 19043.1151

    Pip
      My Computers

  8. Hary's Avatar
    Posts : 12
    Win 10 Pro
       #8

    Very fast, whitout problems.
      My Computers

  9. dorcom's Avatar
    Posts : 106
    Windows 10 x64 Ver. 20H2 Build 19042.964
       #9

    Stigg said:
    ^ ^ ^ ^ ^ ^ ^ ^

    What Pip asked.

    My guess is that I don't think anyone really knows outside of Microsoft headquarters.
    "We tell you what you need and we make you safe"
      My Computer


 
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