257-Turn Off Application Compatibility Engine

Filled under:


Computer/User Node :
   MACHINE

Policy Path :
   Administrative Templates\Windows Components\Application Compatibility

Supported on :
   At least Microsoft Windows Server 2003

Help/Explain Text :
   This policy controls the state of the application compatibility engine in the system. The engine is part of the loader and looks through a compatibility database every time an application is started on the system. If a match for the application is found it provides either run-time solutions or compatibility fixes, or displays an Application Help message if the application has a know problem. Turning off the application compatibility engine will boost system performance. However, this will degrade the compatibility of many popular legacy applications, and will not block known incompatible applications from installing. (For Instance: This may result in a blue screen if an old anti-virus application is installed.) This option is useful to server administrators who require faster performance and are aware of the compatibility of the applications they are using. It is particularly useful for a web server where applications may be launched several hundred times a second, and the performance of the loader is essential.

Registry Settings :
  HKLM\Software\Policies\Microsoft\Windows\AppCompat!DisableEngine

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