KB4034674 (OS Build 15063.540)

Madalina Dinita
by Madalina Dinita
Former Managing Editor
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KB4034674 bugs

Microsoft recently rolled out cumulative update KB4034674 to Windows 10 version 1703, bringing a series of useful bug fixes and improvements. This update fixes the annoying crashes triggered by Applocker and adds a bevy of security improvements to many Windows OS components. The update takes the OS build to version 15063.540.

KB4034674 official change log

  •  Addressed the issue where the policies provisioned using Mobile Device Management (MDM) should take precedence over policies set by provisioning packages.
  • Fixed the issue where the Site to Zone Assignment List group policy (GPO) was not set on machines when it was enabled.
  • Addressed the issue where the AppLocker rules wizard crashes when selecting accounts.
  • Addressed the issue where the primary computer relationship is not determined when you have a disjoint NetBIOS domain name for your DNS Name. This prevents folder redirection and roaming profiles from successfully blocking your profile or redirects folders to a non-primary computer.
  • Addressed the issue where an access violation in the Mobile Device Manager Enterprise feature causes stop errors.
  • Security updates to Microsoft Edge, Microsoft Windows Search Component, Microsoft Scripting Engine, Microsoft Windows PDF Library, Windows Hyper-V, Windows Server, Windows kernel-mode drivers, Windows Subsystem for Linux, Windows shell, Common Log File System Driver, Internet Explorer, and the Microsoft JET Database Engine.

There is also one known issue on the list. More specifically, this update may change Czech and Arabic languages to English for various apps. For the time being, there is no workaround available to solve this problem. Microsoft is already working on a fix and will provide an update in an upcoming release.

Download KB4034674

Windows Update will automatically download and install this update as part of the official Patch Tuesday. You can also download the stand-alone package for KB4034674 from the Microsoft Update Catalog website.

Have you downloaded KB4034674 on your PC? Did you encounter any issues after you installed the update? Let us know in the comments below.


  • I had to uninstall this update (KB4034674) due to it disabling my ability to left click on Start Menu, Acton Center and my network icon ins the system tray.

  • This Update breaks the software for my Steelseries Merc gaming Keyboard. And I have them on Three different PC’s all of them will not recognize the Keyboard software, after the update, which means the Extra keys on the Keyboard only function as web browser forward and backwards which is no use to me as I have these keyboards set up for the games I play. Removing this Update enables the Keyboard and the software to function again. But for how long I don’t know. These keyboard have been working flawlessly since xp/Vista/Windows 7 and windows 10 until Tuesday patch day. Gutted.

  • After the upgrade the action center does not open, I can not even use the left mouse button on the volume control. I uninstalled the Classic Shell, which I use to have the old menu, and then neither does the start menu work. I have already restored windows 2 times.

  • Lost internet access after the update. IP address starts 169. I’ve tried everything I can find but can’t get it to assign a proper IP address since the update