Windows 7 Compatibility Update

Article ID: 974332 – Last Review: September 22, 2009 – Revision: 1.0

Windows 7 and Windows Server 2008 R2 Application Compatibility Update

The Windows 7 and Windows Server 2008 R2 Application Compatibility Update is a software update that improves the compatibility experience in Windows 7 and Windows Server 2008 R2. Microsoft regularly releases Windows 7 and Windows Server 2008 R2 Application Compatibility Updates.

The kinds of problems that are resolved by application compatibility updates

When you try to install and run certain legacy games or applications in Windows 7 and Windows Server 2008 R2, you may experience one or more of the following symptoms:

The game, the application, or the firmware is installed incorrectly.
The game, the application, or the firmware causes system instability.
The primary functions of the game, the application, or the firmware do not work correctly.

Applications that experience a change in behavior after you install this update

The following table shows the applications that were added to the cumulative update package. This table also shows the behavior of the application after you install the update.
Application compatibility updates trigger several changes in Windows 7 and Windows Server 2008 R2. The following are the three most common:

Hard block
The update puts a hard block on the application. A hard block prevents an application that is incompatible with Windows 7 and Windows Server 2008 from running on the system.
Note Microsoft enables Windows to put a hard block on a non-Microsoft application only if the manufacturer of the application gives its consent.
Soft block
The update puts a soft block on the application. A soft block notifies you when an application that is incompatible with Windows 7 starts to run.
Update
The update improves the application’s functionality in Windows 7.

23-09-2009 8-25-46 PM

For additional information see: http://support.microsoft.com/KB/974332