November 14, 2017—KB4048956 (OS Build 10240.17673)

Improvements and fixes

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

• Addressed issue where roaming user profile–enabled accounts intermittently synchronize the appdata\local and \locallow folders with the profile server. Side effects include increased profile size, which can result in logon failures when there is full disk usage. Other symptoms include increased network bandwidth and logon or logoff delays on domain-joined computers.

• Addressed issue where applications based on the Microsoft JET Database Engine (Microsoft Access 2007 and older or non-Microsoft applications) fail when creating or opening Microsoft Excel .xls files. The error message is: “Unexpected error from external database driver (1). (Microsoft JET Database Engine)".

• Addressed issue where access to the Trusted Platform Module (TPM) for administrative operations isn't restricted to administrative users.

• Addressed issue where the virtual smart card doesn't assess the Trusted Platform Module (TPM) vulnerability correctly.

• Addressed issue where, during BitLocker decryption or encryption of a drive, files protected with the Encrypting File System (EFS) may become corrupted.

• Addressed issue that caused SharePoint Online sites to stop working in Internet Explorer.

• Addressed a crash in Internet Explorer that was seen in machines that used large font-size settings.

• Security updates to Internet Explorer, Microsoft Scripting Engine, Microsoft Edge, Windows kernel, Windows kernel-mode drivers, Microsoft Graphics Component, Microsoft Windows Search Component, and Windows Media Player.

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.

Known issues in this update

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.

File information

For a list of the files that are provided in this update, download the file information for cumulative update 4048956.