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Windows compatibility mode problem. Error code 151

Windows XP supports compatibility mode for past versions of windows. Compatibility mode refers to a method that enables programs designed for past versions of windows to be executable in a virtual environment of Windows XP.
But when using Windows compatibility mode, GameGuard is not able to initialize the functions suitable for the current Windows system, and so the game will not load. Therefore, please disable the compatibility mode according to the process below. ( Once the compatability mode is disabled, the game will load normally. )

Step 1.
Right-click on the game icon that you wish to play, and select Properties.

Step 2.
In the Properties windows, select the compatibility tab .


Step 3.
Check whether compatibility mode is enabled. Compatibility mode is being used if the compatibility mode box is checked.
(Windows 95 compatibility mode is being used in the picture below.)

Step 4.
Press OK after unchecking the check box of compatibility mode.