First of all i moved over to an imac from windows about 2 years ago and have never had any issues, untill now............... Whenever I boot my Imac i get a 'kernel panic' message (grey screen with 'you need to restart your computer blah blah' in 4 languages). I can not boot from my Mac HD, nor from a bootable superduper backup external HD, nor from my orginal SL or Leopard disk. All go into the kernel panic. I can however boot from my bootcamp Windows Vista partition. Tried booting into safe mode also does not work and gives the kernel panic screeb. I have run both the standard and extended hardware tests and both have no errors. I booted in single user mode(hurrah that still works)and done a fcsk and unmount and both are without errors. Also done RAM flash. In single user modei can not find a PanicReporter directory or panic log. I have no clue what could be wrong here and what is worse no idea how to solve this and get out of this mess. Can not even install a fresh SL copy as my DVD wont boot either. Any of you gurus have any ideas what this could be and can help my on my way again troubleshooting this ? Thanks in advance for the help.