I have P4 processor with 256 RAM and XP as OS.I have recently installed this game to revise my old memories.But it get too much time in loading and often crashes.Can you tell me what's wrong with it?

Need For Speed is just so good in all car racing game. First you check the minimum hardware requirement of the game.If it is ok then check the service pack version of your OS. Then check in task manager , any unwanted program are not running if any running so go to there right click on it and select end process..Then start your game.