Before anyone say "search" I did search and all the methods didn't help. Wen to software update and security update. When upgrade was done I rebooted the system as it asks. Now the PB only boots to the gray screen with the apple logo but no spinning wheel under it and it stays stuck. -Rebooting manually didn't work -Left the PB like that for an hour and nothing -"safe mode" holding shift after power up doesn't work -"single mode user" hold command + S after power up doesn't work So I tried with the install cd, I got to disk utility and repair disk but a message came up "no repair necessary" Any help would be greatly appreciated.