HI, first time poster so bare with me... Here is my situation. I have a 15"powerbook that has the 1.5 processor.. Yesterday I was typing some notes and then installed the newest security update which was brought up by the automatic update. After i did not restart my computer but just simply shut it down and did not touch it for the rest of the day. Now today I went to try and turn it on and it first made the normal turn on sound and went to the grey screen with the apple, then the screen just went all blue and there was nothing but the mouse pointer.. Normally I have to login with a password.. Now i cant even use the computer.. It just has a blue screen and the loading circle that spins constantly.. Does anybody know what happened and what I need to do.. I am out of a job and really dont have any money to take it into the mac repair shop... thanks guys/gals for any help.