When I boot it after shutting it down, the wheel keeps spinning and the computer doesn't make any noise. Then instead of the apple logo I get a circle with a line through it. After that, if i boot into safe mode then boot normally it works...until i shut the computer down again. Thanks! NOTE- Its only after I don't use the computer for awhile that it doesn't boot up. Then I have to boot in safe mode for it to work again. NOTE 2: I remember what i did before i had this problem. I deleted the launchAgents and LaunchDaemons folders for some stupid reason..