(My friend does not have an account here) My friend came to me and told me her iMac will no longer boot up, so I went to have a look at it. I turned it on, heard the Mac startup chime and it showed the Apple logo upon the white screen in a few seconds. After about a minute or so of showing the Apple boot screen, it'll give a Kernel Panic screen while staying at the boot screen. I tried rebooting it several times by both holding the power button and pulling the plug, but nothing worked. I tried her CD's and it would not boot to the CD's. What can I do? Would holding Shift while booting help? I can't figure anything else out, oddly, since I'm a computer guy but I know next to nothing about working with Macs. She tells me that she didn't do anything for this to happen, like downloading or installing anything or messing with system preferences. She also told me it's specifications if that would be any help. It has: 3.4GHz Intel Core i7 16GB RAM 1TB Hard Drive What can I do to fix it?