Yes, i'm an idiot. i was looking at how much memory i had left because i'm starting school tomorrow and i saw something that said something about another party read only or write only and i changed it so only i (administrator) had access. i'm on a macboox pro, snow leopard. can someone PLEASE help me fix this? i have a class in like 6 hours and have no idea how to fix it! Thank yo in adavance i'm seriously desperate. I'm sorry - now iwhen i turn it on it goes to blue screen - won't let me put my name in (doesn't even show the box). all ic an do is turn it on or hold the power button to make it turn off.