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.

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
After installing KB4042895, package users may receive an error message that states that an application exception has occurred when some applications are closed. This can affect applications that use mshtml.dll to load web content. This problem occurs only when a process is already shutting down, and doesn't affect application functionality. Microsoft is working on a resolution and will provide an update in an upcoming release.
After installing this KB, Internet Explorer 11 users who use SQL Server Reporting Services (SSRS) may not be able to scroll through a drop-down menu using the scroll bar. Using the scroll wheel on a mouse works as expected. This issue only applies to document mode 11, so attempting to load the page with document mode 10 may work around the issue.
To change the document mode in Internet Explorer 11:

  1. Select F12.
  2. Select the Emulation tab.
  3. On the Document modemenu, select 10. The page will reload in the new document mode.

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.

File information

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


PC Direct download links for KB4048956 from Microsoft Update Catalog:

Download KB4048956 MSU for Windows 10 Version 1507 32-bit (x86) - 474.3 MB

Download KB4048956 MSU for Windows 10 Version 1507 64-bit (x64) - 885.1 MB