Introduction
A compatibility update for the web and media upgrade experience is available. This update improves the web, store, and media upgrade experience when you upgrade the operating system to the latest version of Windows 8.1 or Windows Server 2012 R2. Additionally, this update offers the latest compatibility status of the applications, devices, and drivers that are already installed on your computer.
More Information
Update information
How to obtain this update
This compatibility update is offered when you upgrade to the release version of Windows 8.1 or Windows Server 2012 R2.
Upgrade actions
This compatibility update may trigger several actions when you upgrade to the latest version of Windows 8.1 or Windows Server 2012 R2. The following are the most common actions that may be triggered:
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Upgrade blockPuts an upgrade block on an application that may cause the upgrade to Windows 8.1 or to Windows Server 2012 R2 to fail. Windows 8.1 and Windows Server 2012 R2 put an upgrade block on a third-party application only if the manufacturer is notified. The user must uninstall the application to continue with the upgrade.
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Hard blockWhen a hard block is put on an incompatible application, you cannot run the application after you upgrade. Windows 8.1 and Windows Server 2012 R2 put a hard block on a third-party application only if the manufacturer is notified. Improves the user experience by warning the end-user and providing a "more information" URL about the product.
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Soft blockA soft block notifies you when a primary function of an application may not work or may cause application instability. Improves the user experience by warning the end-user and providing a "more information" URL about the product.
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Driver blockMay block an existing driver on your computer when you upgrade to Windows 8.1 or to Windows Server 2012 R2. If this occurs, a driver for Windows 8.1 or Windows Server 2012 R2 is installed.
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Block upgrade, can reinstallMay block the upgrade to Windows 8.1 or Windows Server 2012 R2. To continue the upgrade, you must uninstall the application or driver. After Windows 8.1 or Windows Server 2012 R2 is installed, the application or driver can be reinstalled, and may then function correctly.
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Reinstall after upgradeAllows the upgrade to the release version of Windows 8.1 or Windows Server 2012 R2 to complete successfully. However, you can reinstall the application or device after the upgrade.
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Migration blockThis action blocks an incompatible application from being migrated either completely or partially during the upgrade from Windows 8 to Windows 8.1 so that the upgrade completes successfully.
Changes in upgrade behavior when you install the update
Applications or devices may experience a change in behavior after this compatibility update is installed.
Update replacement information
This update does not replace a previously released update 2933811.
References
See the terminology that Microsoft uses to describe software updates.
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.
