There's the problem right there.
Please let your cousin, or your cousin's parents know that the reason that their computer runs worse than a steaming pile of feces is because they are too damn cheap to spend $40 to buy the minimum recommended amount of RAM to run windows XP.
Seriously, the LOWEST amount of RAM that any computer intended to run any modern operating system is 512MB. Hell, I'm sure you could get away with something as low as 256MB, but when the majority of mid-to-high end computers are using 4096MB, and with RAM as cheap as it is, there's no reason not to have at least 512MB. And don't tell me that they can't afford to upgrade either, with a processor like that.