hi im using a macbook with only 512 mb of ram. i know that that is not enough. before i had a post asking why my computer messes up after 24 hours of being on. they recommended me not to use limewire and install another program called acqlite. that program lets my computer stay on for about 3 days. so now... i do not run any programs like that but it still seems to mess up after a couple days of being on. should i just shut down my computer everynight to avoid this happening? thanx