January 18, 2018 - KB4075200 (OS Build 10586.1358)

Applies to: Windows 10 Version 1511

This update can be applied to Windows 10 Enterprise and Windows 10 Education editions only. This update isn't applicable to Windows 10 Pro or Windows 10 Home editions and won't install.

Improvements and fixes

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

  • Addresses issue where some customers with AMD devices get into an unbootable state.
  • Addresses issue where a part of the system does not log off correctly, which leads to repeated queries for user credentials.

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

For more information about the resolved security vulnerabilities, see the Security Update Guide.

Windows Update Client Improvement
Microsoft will release an update directly to the Windows Update Client to improve Windows Update reliability. It will only be offered to devices that haven't installed the most recent updates.

Known issues in this update

Symptom Workaround
When calling CoInitializeSecurity, the call will fail if passing RPC_C_IMP_LEVEL_NONE under certain conditions.

When calling CoInitializeSecurity, the call may fail when passing RPC_C_AUTHN_LEVEL_NONE as the authentication level. The error returned on failure is STATUS_BAD_IMPERSONATION_LEVEL.
Change the authentication level parameter to RPC_C_AUTHN_LEVEL_CALL.
Microsoft is working on a resolution and will provide an update in an upcoming release.
Due to an issue with some versions of antivirus software, this fix only applies to the machines where the antivirus ISV has updated the ALLOW REGKEY. Contact your antivirus AV to confirm that their software is compatible and have set the following REGKEY on the machine


Value Name="cadca5fe-87d3-4b96-b7fb-a231484277cc"



How to get this update

To get the standalone package for this update, go to the Microsoft Update Catalog website.

File information

For a list of the files that are provided in this update, download the file information for cumulative update 4075200.

Source: https://support.microsoft.com/en-us/...uild10586-1358

Direct download links for KB4075200 from Microsoft Update Catalog:

Download KB4075200 MSU for Windows 10 Version 1511 32-bit (x86) - 535.0 MB

Download KB4075200 MSU for Windows 10 Version 1511 64-bit (x64) - 914.1 MB