The update that is described in this article was replaced by a more recent update. To apply the latest update, please click the following article number to view the article in the Microsoft Knowledge Base:
935280 July 2007 Windows Vista Application Compatibility Update
Windows Vista Application Compatibility Updates are software updates that address common application compatibility issues in Windows Vista. Microsoft releases Windows Vista Application Compatibility Updates regularly.
If you want to immediately install this update, follow these steps:
Click Start, click All Programs, and then click Windows Update.
In the navigation pane, click Check for updates, and then follow the steps to install all recommended updates.
This article is intended for a beginning to intermediate computer user.
You may find it easier to follow the steps if you print this article first.
Kinds of problems that are resolved by application compatibility updates
When you try to install and run certain legacy games or applications in Windows Vista, you may experience one or more of the following symptoms:
The game or application may not be installed correctly.
The game or application may cause system instability.
The primary functions of the game or application may not work correctly.
Applications that will experience improved support after you install this update
This update improves support in Windows Vista for the following applications:
How to troubleshoot application compatibility issues that are not resolved by the latest application compatibility update
Perform the following troubleshooting steps if you install the latest version of the application compatibility update, and you still experience application compatibility issues in Windows Vista:
Restart the computer after you install the application compatibility update to allow for any additional process to be completed and for drivers to be loaded correctly
Run the program in compatibility mode
When you select the compatibility mode option, Windows Vista emulates the selected operating system when you run that particular program. To run the program in compatibility mode, follow these steps:
Click Start, and then type the name of the program in the Start Search box.
In the Programs list, right-click the program name, and then click Properties.
On the Compatibility tab, click to select the Run this program in compatibility mode for check box.
In the list, select an operating system, and then click OK.
Contact the program vendor
If a program will not run in Windows Vista, or a piece of hardware does not function as expected after you install Windows Vista, contact the program vendor or the hardware manufacturer for guidance about how to troubleshoot the issue. Typically, the software vendor's Web site provides a support section that includes additional information about compatibility.
Frequently, the software vendor will be able to resolve the incompatibility issue by providing one of the following resolutions:
An update to make the current version of the program compatible with Windows Vista
A version of the program that is compatible with Windows Vista
Information about any configuration changes to make the program compatible with Windows Vista
For information about your hardware manufacturer, visit the following Web site:
Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.
If you continue to experience application compatibility issues in Windows Vista, you might want to ask someone for help or contact support. For information about how to contact support, please visit the following Microsoft Web site:
For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services
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If you have any problems when you try to obtain the Windows Vista Application Compatibility Update, you might want to ask someone for help or contact support. For information about how to contact support, please visit the following Microsoft Web site:
How to tell if you have the latest update installed
Windows Vista Application Compatibility Updates are delivered by the Automatic Update feature in Windows Vista. You may already have this update installed. To determine whether this update is already installed, visit the following Windows update site, and then click View Update History:
For more information about the latest application compatibility updates, click the following article number to view the article in the Microsoft Knowledge Base:
953960 How to obtain the latest Windows Vista Application Compatibility Update and the applications that are included in Windows Vista Application Compatibility Update
You must restart the computer after you apply this update.
Known issues after you install the update
After you install this update, a CD device or a DVD device may not work correctly. When you select the device in Device Manager and then view the properties for the device, you may receive the following error message:
The software for this device has been blocked from starting because it is known to have problems with Windows. Contact the hardware vendor for a new driver. (Code 48)
This issue occurs because an earlier application may install drivers that are incompatible with Windows Vista.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Windows Vista Service Pack 1.
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.