This policy setting configures the Program Compatibility Assistant (PCA) to diagnose failures with application installations. ...

Windows 7

This policy setting configures the Program Compatibility Assistant (PCA) to diagnose failures with application installations. 

If you enable this policy setting, the PCA is configured to detect failures in the execution of application installers through heuristics. When potential failures are detected, the PCA will provide the user with an option to restart the installer with Microsoft Windows XP compatibility mode.

If you disable this policy setting, the PCA is not configured to detect failures in execution of program installers.

If you do not configure this policy setting, the PCA will enable this diagnostic scenario by default.

Note: Disabling the "Turn off Program Compatibility Assistant" policy setting will cause this policy setting to have no effect. The Diagnostic Policy Service (DPS) and Program Compatibility Assistant Service must be running for the PCA to execute. These services can be configured using the Services snap-in to the Microsoft Management Console.

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