This policy setting determines whether the Program Compatibility Assistant (PCA) will diagnose failures with application installers that are not detected to run as administrator. If you enable this policy setting, the PCA is configured to detect application installers which do not have privileges to run as administrator by the User Access Control (UAC). When potential failures are detected, the PCA will provide the user with an option to restart the installer as administrator. If you disable this policy setting, the PCA will not detect application installers which do not have privileges to run as administrator by the UAC. If you do not configure this policy setting, the PCA will be configured to detect application installers which do not have privileges to run as administrator by the UAC. 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. Fix: (1) GPO: Computer Configuration\Administrative Templates\System\Troubleshooting and Diagnostics\Application Compatibility Diagnostics!Detect application installers that need to be run as administrator (2) REG: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WDI\{D113E4AA-2D07-41b1-8D9B-C065194A791D}!ScenarioExecutionEnabled