1- some computers when install windows7 Or XP on them the system directly install the VGA driver but the problem that the games that created by Glscene doesn't work until we install the VGA driver from the CD driver like nVidia Cards the system directly install the driver but the games don't work until we install the driver ( when the system install the driver the OpenGL version will be 1.1 but when I install the driver from the CD the version of Open Gl will be 1.3 or more )

is there any solution to this problem like for example install the OpenGL as DirectX

2- how can I know what my game needs ( VGA , Memory , CPU )