I hate to break it to you, but pre-built PCs and laptops can't overclock, as companies lock their motherboard BIOS, to prevent this kind of thing. And even if you could, I doubt you can go far enough, to see a difference.
dam well its soooo old
and my sis wants to play club penguin
and the proccesor is only 400mhz
its like 10 years old
could i still try
and if i could can you tell me how and what program i need
Usually pre-built companies, like HP or Dell lock their BIOS, from overclocking. Even if you can, I guarantee you won't get far. Those components just weren't designed to...
Okay for one, if it's only 400MHz you would likely fry it before you got any sort of performance boost from it, and that's if you found a way to over clock it.
I'm pretty sure they've locked the BIOS forever. They do it so you do not fry it and then get it replaced under warranty.