my friend is not the smartest of all people and she is a newb to macs and had some trouble earlier today and i was going to see what the diagnosis/problem would be if anyone could diagnose or remedy the problem. She says that her macbook (that she got for free and she completely underappreciates its value) locked up while she was running safari and limewire. now this part completely baffles me why this would be anyones first response to a little hang up in the system. she pulled the battery out! just removed it because she says the system wasn't responding. now when she tries to boot up the chime still sounds but instead of getting the little gray pin wheel she gets a folder with a question mark..... and then the boot doesn't continue past there..... any diagnoses or remedies?