For more information about these improvements, see the "Applications or devices that experience a change in behavior after you install this update" section and the "Applications and devices that are included in this update" section.
How to obtain this update
Method 1: Windows UpdateThis 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 Download CenterThe following files are available for download from the Microsoft Download Center:
|All supported x86-based versions of Windows 8.1||Download the package now.|
|All supported x64-based versions of Windows 8.1||Download the package now.|
|All supported x64-based versions of Windows Server 2012 R2||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:
The kinds of problems that are resolved by application compatibility updatesWhen you try to install and run certain games or applications on Windows RT 8.1, Windows 8.1, or Windows Server 2012 R2, you may experience one or more of the following symptoms:
- The game, the application, or the driver is installed incorrectly.
- The game, the application, or the driver causes system instability.
- The primary functions of the game, the application, or the firmware do not work correctly.
Applications or devices that experience a change in behavior after you install this updateThe following table lists the applications and devices that are affected by this cumulative update package. This table also describes the behavior of these applications and devices after you install the update.
Compatibility updates trigger several changes in Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2. The most common changes are as follows.
Hard blockA hard block prevents an application that is incompatible with Windows RT 8.1, Windows 8.1, or Windows Server 2012 R2 from running on the system.
Note Microsoft lets Windows put a hard block on a non-Microsoft application only if the manufacturer is notified.
Soft blockA soft block notifies you when a primary function of the application may not work or may cause application instability.
Driver blockA driver block may block an existing driver on your computer. When the driver is migrated during the upgrade, an Inbox driver will be installed.
Applications and devices that are included in this update
|Application or device||Version||Behavior after you install the update|
|Cypress EZ-USB||2135S||Mouse is recognized on USB 3.0 port.|
|AMD USB xHCI Controller||Not available||Random system crash is eliminated.|
|Intel Sunrise Point xHCI Controller|
Intel Sunrise Point LP xHCI Controller
Intel Cherry View K xHCI Controller
|Not available||Bluetooth file transfer finishes.|