Hi, My iMac OS X Leopard when turned on after being off came up with a grey screen with "You need to restart your computer. Hold down the power button for several seconds or press restart button" I did this but it just keeps showing the same message. I've had a search and it seems to be called a 'Kernal Panic' and as well as that message in the top left of the screen theres white text on a black background. I can't get into the computer at all, the Mac starts up as normal with the apple logo then goes straight onto this screen and you can't get out of it. I've tried Apple Hardware Test disks and both have come up with no errors...tho I'm not even sure if these would help at all! The only other thing I've been able to find is people fixing the Kernal Panic who can actually get into there computer and sort it through that, which of course I can't do. The only other option I've seen is to reformat my iMac, unless anyone knows how to do it without doing this? This is my first Mac so I've never had to reformat one before, how would I go about saving my files on there since I can't actually get past the error screen? I've backed up a lot of my documents on a external hard drive but there are some things of my Mac I'd like saving. If anyone knows how to solve the Kernal Panic, or could take me through how to save my documents then reformat it I'd so grateful! I'm still within my Apple Care, but it seems they only take you through what to do over the phone, does anyone know what happens if I can't fix it? I'm hopeless at this side of computers, but obviously want it fixed asap. Any help would be appreciated thanks!