KB4467684 fixes File Explorer crashes but brings bugs of its own

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windows 10 KB4467684

Yesterday, I wrote about a new update that was going to released before the new Patch Tuesday (December 11) and it seems Microsoft has obliged by doing exactly that. In fact, Microsoft had released a few different updates, but let’s start with one of the biggest, which is Cumulative Update KB4467684.

Please Note: This update applies to Windows 10, version 1607, Windows Server 2016.

Windows 10 KB4467684 (OS Build 14393.2639)

Let’s look at the various fixes that Microsoft hopes will be dealt with by Cumulative Update KB4467684 once this patch is installed. It only contains improvements and no new operating system features are included.

Improvements and fixes

  • Addresses an issue that causes the GetCalendarInfo function to return an incorrect era name on the first day of the Japanese era.
  • Addresses time zone changes for Russian daylight standard time.
  • Addresses an issue that allows mouse movements promoted by touch to bypass low-level mouse hooks designed to block mouse input. As a result, unexpected WM_MOUSEMOVE messages appear.
  • Addresses an issue that may automatically display the software keyboard when you tap on the non-editable area of a Universal Windows Platform (UWP) application. This issue affects devices that have installed the Windows 10 Anniversary Update and have no physical keyboard.
  • Addresses an issue in File Explorer that sometimes deletes the permissions of a shared parent folder when you delete the shared child folder.
  • Addresses an issue that causes File Explorer to stop working during logoff.
  • Addresses an issue in the Universal CRT that sometimes causes the AMD64-specific implementation of FMOD to return an incorrect result when given very large inputs.
  • Addresses an issue that blocks ActiveX controls in Internet Explorer on 64-bit systems. This occurs when using Windows Defender Application Control and creating a policy that allows all ActiveX controls to run in Internet Explorer.
  • Addresses an issue that prevents some applications from running when Windows Defender Application Control (Device Guard) is in audit mode.
  • Addresses an issue that slows server performance or causes the server to stop responding because of numerous Windows firewall rules. To enable the changes, add a new registry key “DeleteUserAppContainersOnLogoff” (DWORD) on
  • “HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesSharedAccessParametersFirewallPolicy” using Regedit, and set it to 1.
  • Addresses an issue that causes network connectivity to fail when 802.1x authentication fails.
  • Addresses an issue with Network Connection Status Indicator (NCSI) gateway MAC address resolution timing, which causes Internet connectivity to fail.
  • Addresses an issue that fails to clean up some Windows Management Instrumentation (WMI) class registrations correctly when using Hyper-V cmdlets that have rootinterop class dependencies. This issue may cause Virtual Machine management tasks (using PowerShell or the UI) to fail. Additionally, Virtual Machines may not be created or modified. 
  • Addresses an issue that prevents domain controllers from applying the Group Policy password policy when the minimum password length is configured to be greater than 14 characters.
  • Addresses an issue with Just Enough Administration (JEA). 
  • Addresses an issue that writes to a memory call stack with the Stop code “0xA” in Storage Replica environments.
  • Addresses an issue that causes the installation and client activation of Windows Server 2019 and 1809 LTSC Key Management Service (KMS) host keys (CSVLK) to not work as expected. For more information about the original feature, see KB4347075.
  • Addresses an issue that causes promotions of non-root domains to fail with the error, “The replication operation encountered a database error.” The issue occurs in Active Directory forests that have optional features like Active Directory recycle enabled.
  • Addresses an issue that may cause Hyper-V servers to stop working with the error, “0x7F (UNEXPECTED_KERNEL_MODE_TRAP)”.

KB4467684 known issues

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Not surprisingly, there are a couple of known issues with Cumulative Update KB4467684.


For some users, instantiation of SqlConnection can throw an exception. Other users may not be able to use the Seek Bar in Windows Media Player when playing specific files.


There are no known workarounds for the two issues above. Microsoft says, “Microsoft is working on a resolution and will provide an update in an upcoming release.”

How to get this update

Microsoft recommends that to install Cumulative Update KB4467684, you use the update feature in Settings > Update & Security > Windows Update > Check for updates.

However, if you would like to run this update as a stand-alone package, use the Microsoft Update Catalog. For more information, check out Microsoft’s support page.


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