You're going to need to provide full specs. If your laptop has Windows XP, it probably has some pretty old hardware, and it might not be capable of running the game. Fallout 3 does not work on any integrated graphics chip without the use of a mod, if you have Intel integrated graphics, you'll need to use that mod to get the game to even start. Even then, don't expect great performance, especially if it's an older Intel integrated chip from the previous decade.