So today at Uni I've been using my MBP to take notes among other things. Towards the end of the day, I open my MBP and it's at the log in screen after waking up from sleep. Everything is frozen and nothing would work. I perform a hard shiutdown and try to turn the computer on. Sleep light flashes once, optical drive does the usual sound, but I go straight away to a grey screen and the fans are spinning fast eventhough the computer is ice cold. I've tried the following: Reset the pram tried repairing using disk utilities reinstalled Mac osx The only break through i got was when i safe booted and i was able to get to the log in screen, but the track pad and keyboard wouldn't work. So I used a usb mouse to restart the computer. MBP doesn't reboot and I'm back to square one. Anyone know what else I can do? What the problem is? or how to properly erase and install Mac OS X. Because I'm not sure if i'm doing it right. Any help is appreciated!