Microsoft today pushed Windows 10 Build 17134.556 (10.0.17134.556) as cumulative update KB4480976 to those on the latest April 2018 update or on Windows 10 version 1803.

The changelog for the Build 17134.556 mentions many more fixes, improvements, and security updates. The latest update addresses an issue in Microsoft Edge that fails to trigger the focusing event if the focus event listener of an element shifts focuses to another element.

Windows 10 Build 17134.556 Changelog:

Improvements and fixes


This update includes quality improvements. No new operating system features are being introduced in this update. Key changes include:

  • Addresses an issue in Microsoft Edge that fails to trigger the focus event if the focus event listener of an element shifts focuses to another element.
  • Addresses an issue that prevents sharing and timeline features and roaming settings from working for accounts that use Chinese, Japanese, and Korean languages.
  • Addresses an issue that may prevent some applications from displaying the Help (F1) window correctly.
  • Addresses an issue that causes power options to appear on the Windows security screen when the per user group policy to hide power options is set.
  • Addresses an issue that prevents links for certain compressed file formats from resolving.
  • Addresses an issue that causes BitLocker Network Unlock to fail on generation 2 virtual machines when it’s used in a network that only supports IPv4.
  • Addresses a privacy issue with apps that obtain the BroadFileSystemAccess capability without a user’s consent.
  • Addresses an issue in which WAM logging causes some applications such as Microsoft Office to stop working.
  • Addresses an issue that causes catalog signed scripts, including those shipped as part of Windows, to incorrectly generate a Windows Defender Application Control (WDAC) failure audit event.
  • Addresses an issue in which Windows Driver Frameworks causes high CPU utilization. As a result, the user-mode driver stops working when the device resumes from Hibernate (S4).
  • Addresses an issue that may cause a 30-second delay when deleting or renaming a link in a Distributed File System (DFS) Namespace. Additionally, renaming a folder may take 30 seconds when multiple users work in a group share simultaneously, and File Explorer stops responding.
  • Addresses an issue that prevents you from overwriting a file in a shared folder because of an Access Denied error when a filter driver is loaded.
  • Addresses an issue that may cause third-party applications to have difficulty authenticating hotspots.
  • Addresses an issue that may cause a blue screen to appear when a Thunderbolt storage device is attached.

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