Windows 10 Cumulative Update KB4338819 and KB4345421 offline installer are available to download as Microsoft has uploaded them on Microsoft Update Catalog website. You can also grab the download links from this blog post and update your Windows 10 system that is running 1803 version.

Download KB4345421, KB4338819, Windows 10 Offline Installer, Windows 10 version 1803

Both of these cumulative updates are of small size and contain quality improvements and bug fixes rather than new features. KB4338819 update release also contains updates for Microsoft HoloLens (OS Build 17134.165) released.

Microsoft has revealed the full changelog of KB4338819 and KB4345421 Windows 10 Update. Even some known issues are disclosed along with their workaround.

Changelog of KB4338819 Windows 10 Cumulative Update

  • Improves the ability of the Universal CRT Ctype family of functions to correctly handle EOF as valid input.
  • Enables debugging of WebView content in UWP apps using the Microsoft Edge DevTools Preview app that’s available in the Microsoft Store.
  • Addresses an issue that may cause the Mitigation Options Group Policy client-side extension to fail during GPO processing. The error message is “Windows failed to apply the MitigationOptions settings. MitigationOptions settings might have its own log file” or “ProcessGPOList: Extension MitigationOptions returned 0xea.” This issue occurs when Mitigation Options has been defined either manually or by Group Policy on a machine using Windows Defender Security Center or the PowerShell Set-ProcessMitigation cmdlet.
  • Evaluates the Windows ecosystem to help ensure application and device compatibility for all updates to Windows.
  • Security updates to Internet Explorer, Windows apps, Windows graphics, Windows datacenter networking, Windows wireless networking, Windows virtualization, Windows kernel, and Windows Server.

Changelog of KB4345421 Windows 10 Cumulative Update

  • Addresses an issue that may cause some devices running network monitoring workloads to receive the 0xD1 Stop error because of a race condition after installing the July update.
  • Addresses an issue with the DHCP Failover server that may cause enterprise clients to receive an invalid configuration when requesting a new IP address. This results in a loss of connectivity.
  • Addresses an issue that may cause the restart of the SQL Server service to fail occasionally with the error, “Tcp port is already in use”.
  • Addresses an issue that occurs when an administrator tries to stop the World Wide Web Publishing Service (W3SVC). The W3SVC remains in a “stopping” state, but cannot fully stop or it cannot be restarted.

Direct Download KB4338819 Offline Installer

KB4338819 Standalone Package for 32-bit Windows – Download (Size: 374 MB)
KB4338819 Standalone Package for 64-bit Windows – Download (Size: 677 MB)

Direct Download KB4345421 Offline Installer

KB4345421 Standalone Package for 32-bit Windows – Download (Size: 375MB)
KB4345421 Standalone Package for 64-bit Windows – Download (Size: 678 MB)

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