An update to enable an automatic update from Windows 8 to Windows 8.1

Applies to: Windows 8 ProWindows 8 Pro NWindows 8

This article describes an update that enables Windows RT to update to Windows RT 8.1, and that enables Window 8 to update to Windows 8.1. See the prerequisites before you install the update.


If you have Automatic Updates enabled on a computer that has update 2871389 installed, this update enables an automatic Windows 8.1 upgrade.

How to obtain this update

Windows Update

This update is available from Windows Update.

Update detail information


To install this update in Windows RT or Windows 8, you must have update 2871389 installed.

Registry information

To install this update, you do not have to make any changes to the registry.

Restart requirement

You must restart the computer after you install this update.

Update replacement information

This update replaces previously released update 2973544.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


See the terminology that Microsoft uses to describe software updates.