Summary

This compatibility update improves the compatibility experience in Windows RT 8.1 Preview and Windows 8.1 Preview. Microsoft regularly releases Windows compatibility updates to improve the overall user experience. This compatibility update is dated June 2013.

For more information about the improvements, refer to 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.

More Information

Update information

How to obtain this update

This update is applied when you upgrade to Windows 8.1 Preview or Windows RT 8.1 Preview. No interaction is required to apply this update.

The kinds of problems that are resolved by application compatibility updates

When you try to install and run certain games or applications in Windows RT 8.1 Preview or Windows 8.1 Preview, 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 update

The following table lists the applications and devices that were included in 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 Preview and Windows 8.1 Preview. The following are the most common.

Hard block

A hard block prevents an application that is incompatible with Windows RT 8.1 Preview or Windows 8.1 Preview from running on the system.

Note Microsoft enables Windows to put a hard block on a non-Microsoft application only if the manufacturer is notified.

Soft block

A soft block notifies you when the primary functionality of the application is broken or when the application experience is unstable in Windows RT 8.1 Preview or Windows 8.1 Preview.

Driver block

This action blocks an existing driver on your computer. When the driver is migrated during the upgrade, an Inbox driver is installed.

Migration block

This action blocks an incompatible application from being migrated either completely or partially during the upgrade from Windows 8 to Windows 8.1 Preview.

Applications and devices that are included in this update

Application name

Version

Behavior after you install the update

Atheros Bluetooth

Not available

Improves user experience by not migrating the application to Windows 8.1 Preview.

Dr.Web Security Space Pro

7.0, 8.0

Improves user experience by not migrating the application to Windows 8.1 Preview, by blocking the application's installation on Windows 8.1 Preview, and by providing a URL for more information about the product.

Parallels Desktop

4.*

Improves user experience by not migrating the application to Windows 8.1 Preview, by blocking the application's installation on Windows 8.1 Preview, and by providing a URL for more information about the product.

Qihoo 360 Safeguard

9.0.0.1095

Improves user experience by not migrating the application to Windows 8.1 Preview.

Rising Personal Firewall

24.00.11.31

Improves user experience by not migrating the application to Windows 8.1 Preview.

Bitdefender Internet Security 2013

Not available

Improves user experience by not migrating the application to Windows 8.1 Preview.

Norton security products

Not available

Enables the application's functionality.

NECBatt.sys

Not available

Enables the application's functionality.

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

Prerequisites

To apply this update, you must be running Windows RT 8.1 Preview or Windows 8.1 Preview.

Registry information

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

Restart requirement

You do not have to restart the computer after you apply this update.

Hotfix replacement information

This update does not replace a previously released update.

The global version of this update installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows RT 8.1 Preview and Windows 8.1 Preview file information notes

  • The files that apply to a specific product, milestone (RTM,SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Service branch

    6.3.9431.16xxx

    Windows RT 8.1 Preview and Windows 8.1 Preview

    GDR

  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.

For Windows RT 8.1 Preview

File name

File version

File size

Date

Time

Platform

Drvmainarm.sdb

Not Applicable

54,548

21-Jun-2013

11:52

Not Applicable

For all supported x86-based versions of Windows 8.1 Preview

File name

File version

File size

Date

Time

Platform

Drvmain32.sdb

Not Applicable

122,138

21-Jun-2013

11:57

Not Applicable

Sysmain32.sdb

Not Applicable

914,384

21-Jun-2013

11:57

Not Applicable

For all supported x64-based versions of Windows 8.1 Preview

File name

File version

File size

Date

Time

Platform

Drvmain64.sdb

Not Applicable

119,474

21-Jun-2013

11:54

Not Applicable

Sysmain32.sdb

Not Applicable

914,384

21-Jun-2013

11:54

Not Applicable

Sysmain64.sdb

Not Applicable

1,133,476

21-Jun-2013

11:54

Not Applicable


Reference

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

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