Hi Guys I installed the latest security update on my mac book pro on thursday night. since then I've had nothing but bother, from word not opening due to a quicktime error, my CD drive wasn't recognised and now I am getting the following error. /etc/master.passwd: Invalid argument -sh: /etc/profile: Invalid argument -sh-2.05~ CSRHIDTransitionDriver::stop IOBluetoothHCIController::start Idle Timer Stopped grey screen loads at the start and then this error message appears. anyone got any ideas on how to resolve the issue. came home to get my installation CD's but they are no were to be found. anyone know where I can get replacement ones? Thanks in advance for the help. going out of my mind.