Update KB4516421 Available, Not Sure What It Is

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  1. Posts : 50
    Windows 10
       #1

    Update KB4516421 Available, Not Sure What It Is


    As the title said, I saw that KB4516421 was available, but I can't find any information on it. Does anyone know what this update fixes/includes?
    Update KB4516421 Available, Not Sure What It Is-capture.png

    - - - Updated - - -

    Update 09/13/2019: KB4516421 was installed from Windows Update Update KB4516421 Available, Not Sure What It Is-capture.png
    Last edited by khoi3003; 13 Sep 2019 at 20:52.
      My Computers


  2. Posts : 194
    Windows 10
       #2

    I still see it and I have the "download" button. Should I do it? https://i.imgur.com/9NzttJm.png
      My Computer


  3. NMI
    Posts : 947
    Windows 10 Pro, Version 20H2
       #3

    The question is, "Are you feeling lucky punk?" as no one in the world seems certain what it does yet. (Except possibly Microsoft.)

    Although it probably fixes sound issues in games as it apparently updates uac2formatreset.exe, with uac2 being USB Audio Class 2.
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  4. Posts : 194
    Windows 10
       #4

    What is uac2formatreset.exe? Is this a genuine MS file?
      My Computer


  5. NMI
    Posts : 947
    Windows 10 Pro, Version 20H2
       #5

    gorgor said:
    What is uac2formatreset.exe? Is this a genuine MS file?
    We can only guess at present.
      My Computer


  6. Posts : 12,421
    Win10 Version 21H2 Pro and Home, Win11 Pro
       #6

    Or maybe the "uac" part refers to User Account Control?
      My Computers


  7. Posts : 12,421
    Win10 Version 21H2 Pro and Home, Win11 Pro
       #7

    Or maybe the "uac" part refers to User Account Control? And "formatreset" refers to how that is displayed?
      My Computers


  8. Posts : 194
    Windows 10
       #8

    For me it was installed, even I reset the update cache and rebooted: https://i.imgur.com/BYT4CSN.png On another device I dont see it.
      My Computer


  9. Posts : 87
    Win 10 Pro 64 bit
       #9
      My Computer


  10. NMI
    Posts : 947
    Windows 10 Pro, Version 20H2
       #10

    Thanks for finding that, but it says 1903 (as expected) at the top, not 1809:

      My Computer


 

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