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:
- Security updates to Microsoft Edge, Internet Explorer, Microsoft Scripting Engine, Windows Graphics, Windows Kernel, Windows Datacenter Networking, Windows Virtualization and Kernel, and the Windows SMB Server.
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
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.
|Microsoft has reports of some customers on a small subset of older AMD processors getting into an unbootable state after installing this KB. |
To prevent this issue, Microsoft will temporarily pause Windows OS updates to devices with impacted AMD processors at this time.
This issue is resolved in KB4075200.
|Because of an issue that affects some versions of antivirus software, this fix applies only to computers on which the antivirus ISV updated the ALLOW REGKEY.|| |
Contact your antivirus manufacturer to verify that their software is compatible and that they have set the following REGKEY on the computer:
|After installing this update, some users may experience issues logging into some websites when using third party account credentials in Microsoft Edge.||Microsoft is working on a resolution and will provide an update in an upcoming release.|
How to get this update
This update will be downloaded and installed automatically from Windows Update. To get the standalone package for this update, go to the Microsoft Update Catalog website.
For a list of the files that are provided in this update, download the file information for cumulative update 4056888.