Dont have VGA software

Question

Sir i m havin Toshiba Satellite A20 system unit laptop.in my laotop i dond have VGA(GRAPHIC CARD) software/ driver. can u tell me from which website i can download it.i cant work properly without it.can u solve my problem.
Graphic card name is trident cyberblade 32 mb shared. AGP bus128MHzx4, 2D 3D graphic accelerator, simultanious display capable.
pls help me