Around two weeks ago, Microsoft released its Patch Tuesday updates for the month of August. Today, Microsoft has released another set of Windows 10 cumulative updates that contain fixes for issues that the previous patches introduced.

Microsoft is rolling out a new batch of cumulative updates for Windows 10 this morning with non-security improvements and fixes. The systems running Windows 10 April 2018 Update (version 1803) and Windows 10 Fall Creators Update (version 1709) are receiving the new patch with general bug fixes.

Windows 10 update check

According to the changelog, the update fixes a variety of issues in Windows 10. To install the latest patch on your system, open Settings and navigate to Update & Security -> Windows Update and select Check for updates. As always, you can download and install this update manually from here.

Build 17134.254 for Windows 10 April 2018 Update

If you are currently using Windows 10 April 2018 Update, KB4346783 will show up on your devices. This patch advances Windows 10 April 2018 Update PCs to Build 17134.254 and you can download it via Windows Update or Microsoft Update Catalog.

You can find the list of fixes and improvements below:

  • Addresses an issue in Microsoft Foundation Class applications that may cause applications to flicker.

  • Addresses an issue where touch and mouse events were handled differently in Windows Presentation Foundation (WPF) applications that have a transparent overlay window.

  • Addresses a reliability issue in applications that have extensive window nesting.

  • Addresses an issue in the Universal CRT that sometimes causes the AMD64 FMOD to return an incorrect result when given very large inputs.

  • Addresses an issue in the Universal CRT that causes the _get_pgmptr() function to return an empty string.

  • Addresses an issue in the Universal CRT that causes isprint() to return TRUE for a tab when using the C locale.

  • Addresses an issue where Microsoft Edge or other UWP applications can't perform client authentication when the private key is stored on a TPM 2.0 device.

  • Addresses an issue that causes computer certificate enrollment or renewal to fail with an "Access denied" error after installing the April 2018 update. This issue occurs when the registry process has a lower process ID (PID) than all other processes except SYSTEM.

  • Addresses an issue that, in some cases, failed to clear decrypted data from memory after a CAPI decryption operation was completed.

  • Addresses an issue that prevented the Device Guard PackageInspector.exe application from including all the files needed for an application to run correctly once the Code Integrity policy was completed.

  • Addresses an issue where not all network printers are connected after a user signs in. The HKEY_USERS\User\Printers\Connections key shows the correct network printers for the affected user; however, the missing list for network printers from this registry key isn't populated in any app, including Microsoft Notepad, or in Devices and Printers. Printers may disappear or stop functioning.

  • Addresses an issue that prevents printing on a 64-bit OS when 32-bit applications impersonate other users (typically by calling LogonUser). This issue occurs after installing monthly updates starting with KB4034681, released in August 2017. To resolve the issue for the affected applications, install this update, and then do one of the following:

    • Use Microsoft Application Compatibility Toolkit to globally enable the Splwow64Compat App Compat Shim

    • Use the following registry setting, and then restart the 32-bit application:HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Print Setting: Splwow64Compat

      Type: DWORD

      Value1: 1

  • Addresses an issue that causes the Wi-Fi EAP-TTLS (CHAP) authentication to fail if a user saves credential information before authentication.

  • Addresses an issue that causes devices that have 802.1x Extensible Authentication Protocol (EAP) enabled to randomly stop working with the stop code ”0xD1 DRIVER_IRQL_NOT_LESS_OR_EQUAL”. The issue occurs when the kernel memory pool becomes corrupted. Crashes will generally occur in nwifi.sys.

  • Addresses an issue that may remove a Dynamic Host Configuration Protocol (DHCP) option from a reservation after changing the DHCP scope settings.

  • Extends the Key Management Service (KMS) to support the upcoming Windows 10 client Enterprise LTSC and Windows Server editions. For more information, see KB4347075.

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

There's also one known issue in this patch:

Symptom Workaround
Launching Microsoft Edge using the New Application Guard Windowmay fail; normal Microsoft Edge instances aren't affected.

If you’ve experienced the issue and already installed KB4343909, uninstall it.

  1. Install KB4340917.
  2. Install KB4343909.

Microsoft is working on a resolution and will provide an update in an upcoming release.

Build 16299.637 for Windows 10 Fall Creators Update

For those still using Windows 10 Fall Creators Update, your PC will get KB4343893. The update will advance your computers to Build 16299.637 and it comes with the following fixes:

  • Addresses an issue in Microsoft Foundation Class (MFC) applications that may cause applications to flicker.

  • Addresses an issue that causes win32kfull.sys to stop working (Stop 3B) when cancelling journal hook operations or disconnecting a remote session.

  • Addresses an issue that caused users to press Ctrl+Alt+Delete twice to exit assigned access mode when autologon was enabled.

  • Addresses an issue that prevented the Device Guard PackageInspector.exe application from including all the files needed for an application to run correctly once the Code Integrity policy was completed.

  • Addresses an issue that prevents users of PIV/CAC smart cards from authenticating to use enterprise resources or prevents Windows Hello for Business from configuring on first logon.

  • Addresses an issue that causes Microsoft Edge to stop working after setting a DLL rule in AppLocker.

  • Addresses an issue that, in some cases, failed to clear decrypted data from memory after a CAPI decryption operation was completed.

  • Addresses an issue that causes the Wi-Fi EAP-TTLS (CHAP) authentication to fail if a user saves credential information before authentication.

  • Addresses an issue that causes high CPU usage on machines with built-in Sierra broadband modules when switching from WLAN to LAN. The WWanSvc service continually claims additional memory until the machine becomes unresponsive and a black screen appears.

  • Addresses an issue that prevents a checkpoint created on a Windows Server 2016 cluster from being reapplied. This occurs when VMs are running on a cluster-shared volume (CSV), and the error is “Failed to read from stream. HRESULT = 0xC00CEE3A.”

  • Addresses an issue where changes to the %HOMESHARE% path aren't reflected in the folder redirection configuration. As a result, folder redirection for a known folder doesn't work.

  • Addresses an issue that requires a password to be input twice if you connect to a locked device using Remote Desktop Connect.

  • Addresses an issue that causes devices that have 802.1x Extensible Authentication Protocol (EAP) enabled to randomly stop working with the stop code ”0xD1 DRIVER_IRQL_NOT_LESS_OR_EQUAL”. The issue occurs when the kernel memory pool becomes corrupted. Crashes will generally occur in nwifi.sys.

  • Provides a stability resolution for native Peripheral Component Interconnect Express (PCIe) enumeration and the runtime D3 (RTD3) state.

  • Addresses an issue that may remove a Dynamic Host Configuration Protocol (DHCP) option from a reservation after changing the DHCP scope settings.

  • Addresses an issue that may prevent the Start menu from opening after refreshing your PC.

  • Extends the Key Management Service (KMS) to support the upcoming Windows 10 client Enterprise LTSC and Windows Server editions. For more information, see KB4347075.

There are two known issues in this patch:

Symptom Workaround
Some non-English platforms may display the following string in English instead of the localized language: ”Reading scheduled jobs from file is not supported in this language mode.” This error appears when you try to read the scheduled jobs you've created and Device Guard is enabled Microsoft is working on a resolution and will provide an update in an upcoming release.

When Device Guard is enabled, some non-English platforms may display the following strings in English instead of the localized language:

  • "Cannot use '&' or '.' operators to invoke a module scope command across language boundaries."
  • "'Script' resource from 'PSDesiredStateConfiguration' module is not supported when Device Guard is enabled. Please use 'Script' resource published by PSDscResources module from PowerShell Gallery."
Microsoft is working on a resolution and will provide an update in an upcoming release.

As it's important to keep your Windows 10 PC updated, you're recommended to install this patch as soon as possible but if you would like to delay the patch, head to the Settings and tweak your Active hours and Restart options.

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