KB4056891 Download for Windows 10 Version 1703 Creators Update Build 15063.850

Microsoft also released an update for Windows 10 Creators Update Version 1703 tonight , it has the number KB4056891 . It increases the Windows 10 build number to 15063.850 and is now available for download via Windows Update or the Windows Update Catalog. The appropriate download links for your Windows installation can be found at the end of this article.

This update KB4056891 is also a cumulative update for the Creators Update. However, this time it contains very few problem fixes, but there are already 2 problems with this update. Here is the detailed information about this update  KB4056891.

Bug fixes in update KB4056891:

Some security updates for the following areas are included in this update: Internet Explorer, Microsoft Scripting Engine, the Microsoft Edge Browser, Windows Graphics and Windows Kernel components, the Windows Subsystem for Linux and the Windows SMB Server.

Known issues with update KB4056891:

These two problems with the update are currently known.

  • When the ” CoInitializeSecurity ” function is called , the call fails if the RPC_C_IMP_LEVEL_NONE parameter is passed under certain conditions.
    Microsoft is already aware of this problem and will fix this in the next update.
  • There may be problems with some antivirus programs. This manifests itself in the fact that this update KB4056891 is only installed because the ALLOW-REGKEY is set on the computer . Microsoft is reporting this route as a possible workaround . You have to set the following key in the registry.
    HKEY_LOCAL_MACHINE SOFTWARE Microsoft Windows CurrentVersion QualityCompat “
    Value Name =“ cadca5fe-87d3-4b96-b7fb-a231484277cc “
    Type =“ REG_DWORD ”
    Data =“ 0x00000000 ”


Download update KB4056891:

Here you can download the update directly.

– 2018-01 Cumulative Update for Windows 10 Version 1703 for x64-based Systems (KB4056891)
– 2018-01 Cumulative Update for Windows 10 Version 1703 for x86-based Systems (KB4056891)

Note from 01/18/2018: Microsoft released the follow-up update called KB4057144 tonight . It fixes further bugs in the Creators Update and is also supposed to fix the AMD CPU problems.