Compatibility update for keeping Windows up-to-date in Windows 8.1 and Windows 8


This update performs diagnostics on the Windows systems that participate in the Windows Customer Experience Improvement Program. The diagnostics evaluate the compatibility status of the Windows ecosystem, and help Microsoft to ensure application and device compatibility for all updates to Windows. There is no GWX or upgrade functionality contained in this update.

How to obtain this update

Windows Update

This update is available from Windows Update. For more information about how to run Windows Update, see How to get an update through Windows Update.

Update detail information


There are no prerequisites to apply this update.

Restart information

You may have to restart the computer after you apply this update.

Update replacement information

This update does not replace any previously released update.


For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

File Information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.
Windows 8
Windows 8.1
Additional file information


Article ID: 2976978 - Last Review: Feb 9, 2017 - Revision: 7

Windows 8.1 Enterprise, Windows 8.1, Windows 8.1 Pro, Windows 8 Enterprise, Windows 8, Windows 8 Pro