December 3, 2018 - KB4478877 (OS Build 14393.2641)
Applies to: Windows 10 version 1607, Windows Server 2016
Windows 10, version 1607, reached end of service on April 10, 2018. Devices running Windows 10 Home or Pro editions will no longer receive monthly security and quality updates that contain protection from the latest security threats. To continue receiving security and quality updates, Microsoft recommends updating to the latest version of Windows 10.
IMPORTANT: Windows 10 Enterprise and Windows 10 Education editions will receive six months of additional servicing at no cost. Devices on the Long-Term Servicing Channels (LTSC) will continue to receive updates until October 2026 per the Lifecycle Policy page. Windows 10 Anniversary Update (v. 1607) devices running the Intel “Clovertrail” chipset will continue to receive updates until January 2023 per the Microsoft Community blog.
Windows Server 2016 Standard edition, Nano Server installation option and Windows Server 2016 Datacenter edition, Nano Server installation option reached end of service on October 9, 2018. These editions will no longer receive monthly security and quality updates that contain protection from the latest security threats. To continue receiving security and quality updates, Microsoft recommends updating to the latest version of Windows 10.
[ADDED 12/5] Windows 10 Mobile, version 1607, reached end of service on October 8, 2018. Devices running Windows 10 Mobile and Windows 10 Mobile Enterprise will no longer receive monthly security and quality updates that contain protection from the latest security threats. To continue receiving security and quality updates, Microsoft recommends updating to the latest version of Windows 10.
Improvements and fixes
This update includes quality improvements. No new operating system features are being introduced in this update. Key changes include:
- Addresses an issue that prevents the release of the on-demand Source Network Address Translation (SNAT) port allocated to a virtual machine (VM) after the SNAT port is no longer in use. As a result, the SNAT port becomes exhausted.
If you installed earlier updates, only the new fixes contained in this package will be downloaded and installed on your device.
Windows Update Improvements
Microsoft has released an update directly to the Windows Update client to improve reliability. Any device running Windows 10 configured to receive updates automatically from Windows Update, including Enterprise and Pro editions, will be offered the latest Windows 10 feature update based on device compatibility and Windows Update for Business deferral policy. This doesn't apply to long-term servicing editions.
Known issues in this update
| Symptom |
Workaround |
After you install the August Preview of Quality Rollup or September 11, 2018 .NET Framework update, instantiation of SqlConnection can throw an exception. For more information about this issue, see the following article in the Microsoft Knowledge Base:
4470809 SqlConnection instantiation exception on .NET 4.6 and later after August-September 2018 .NET Framework updates. |
Microsoft is working on a resolution and will provide an update in an upcoming release. |
| After installing this update, users may not be able to use the Seek Bar in Windows Media Player when playing specific files. This issue does not affect normal playback. |
Microsoft is working on a resolution and estimates a solution will be available mid-December 2018. |
| When features related to end-user-defined characters (EUDC) are used, the entire system may become unresponsive. |
Double-click any font file or navigate to the font folders immediately after logging on.
Microsoft is working on a resolution and will provide an update in an upcoming release. |
Microsoft strongly recommends you install the latest servicing stack update (SSU) for your operating system before installing the latest cumulative update (LCU). SSUs improve the reliability of the update process to mitigate potential issues while installing the LCU. For more information, see
Servicing stack updates.
If you are using Windows Update, the latest SSU (
KB4465659) will be offered to you automatically. To get the stand-alone package for the latest SSU, go to the
Microsoft Update Catalog.
Install this update
To download and install this update, go to
Settings > Update & Security > Windows Update and select
Check for updates.
To get the stand-alone 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 4478877.
Download KB4478877 MSU for Windows 10 Version 1607 32-bit (x86) - 737.9 MB
Tip
Quote