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The October 2016 Preview of Monthly Quality Rollup includes some new improvements and fixes for the Windows 8.1 and Windows Server 2012 R2 platforms. We recommend that you apply this quality rollup as part of your regular maintenance routines. Before you install this update, see the Prerequisites and the Restart requirement sections.

Improvements and fixes

To learn more about the nonsecurity improvements and fixes in this update, see the "October 18, 2016 – KB3192404" section in Windows 8.1 and Windows Server 2012 R2 update history.

Known issues that are resolved by this update

This update resolves known issues that are caused by security update 3170005. For more information about the known issues, see the
Oct 2016 Update: Mitigation for known issues section in KB 3170005.

How to get this update

Important If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

Method 1: Windows Update

This update is provided as an Optional update on Windows Update. For more information about how to run Windows Update, see How to get an update through Windows Update.

Method 2: Microsoft Update Catalog

To get the stand-alone package for this update, go to the Microsoft Update Catalog website.

Note You must be running Microsoft Internet Explorer 6 or later versions.

Method 3: Microsoft Download Center

The following files are available for download from the Microsoft Download Center:

Operating system


All supported x86-based versions of Windows 8.1

Download Download the package now.

All supported x64-based versions of Windows 8.1

Download Download the package now.

All supported x64-based versions of Windows Server 2012 R2

Download Download the package now.

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to obtain Microsoft support files from online services Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Update detail information


To apply this update, you must have April 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) installed on Windows 8.1 or Windows Server 2012 R2.

Restart requirement

You must restart the computer after you apply this update.

Registry information

To apply this update, you don't have to make any changes to the registry.

Update replacement information

This update doesn't replace any previously released update.

File Information

File name

SHA1 hash

SHA256 hash










File informationFor a list of the files that are provided in this update, download the file information for update rollup 3192404.

More Information

This package updates the Diagnostic and Telemetry service to provide benefit for enterprises using Upgrade Analytics to plan and manage the Windows upgrade process. This update includes:

  • Support to enable upload of telemetry and download of settings in an authenticated proxy environment by impersonating the logged on user

  • Support to configure a specific proxy to upload telemetry and download settings

The Diagnostic and Telemetry service collects usage and diagnostics information from Windows. You can learn more about the Customer Experience Improvement Program (CEIP) here.

This update uses SSL (TCP Port 443) to download manifests and upload telemetry to Microsoft that uses the following DNS endpoints:



This update contains the following two manifests that are used by the service.

  • telemetry.ASM-WindowsDefault.json


Registry informationImportant
Follow the steps in this section carefully. Serious problems might occur if you modify the registry incorrectly. Before you modify it, back up the registry for restoration in case problems occur.

By default on Windows 8.1, support for sending usage and diagnostics information through an authenticated proxy is disabled. When the setting isn't disabled (0x0) through the following registry key, the Diagnostic and Telemetry service will impersonate a logged on user to authenticate with the proxy to send the information. If you are using Upgrade Analytics in a network environment that uses an authenticated proxy, we recommends configuring this setting to 0x0.

  1. Locate and then select the registry subkey HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\DataCollection

  2. On the Edit menu, point to New, and then click DWORD Value.

  3. Type DisableEnterpriseAuthProxy, and then press the Enter key.

  4. In the Details pane, right-click DisableEnterpriseAuthProxy, and then click Modify.

  5. In the Value data box, type 0 (not disabled) or 1 (disabled), and then click OK.

You can also configure the Diagnostic and Telemetry service to forward usage and diagnostics information to a specific proxy server using the following registry path. You can specify the FQDN or IP address of the proxy server and optionally a port number.

  1. Locate and then select the registry subkey HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\DataCollection

  2. On the Edit menu, point to New, and then click String Value.

  3. Type TelemetryProxy, and then press the Enter key.

  4. In the Details pane, right-click TelemetryProxy, and then click Modify.

  5. In the Value data box, type server:port, and then click OK.


For more information about Windows Update, go to the following Microsoft websites:

Troubleshoot problems with installing updates

Windows Update: Frequently Asked Questions

Learn about the terminology that Microsoft uses to describe software updates.

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