I have had an ibook for about a couple of months as of now. And for the first time it has began freezing on start up. It freezes right away and doesn't even go to the starting screen with the apple icon and the small circle showign the loading up. Also when it finishes it frozen mode it goes to a screen where there is only one small folder in the middle with the finder icon and a question mark flashing. If anyone has any ideas as to how I can fix this problem, it would be much appreciated, thanks in advance.