Hi everyone i have a 2011 15" macbook pro. I was running lion and today i was installing the new thunderbolt and airport utility update via software update. there was some problem during the installation and my mbp started giving kernel panics after that. I have reinstalled snow leopard from my install disk and now the problem is solved. What is the cause for kernel panic?? should i worry or just move on?? do i have any hardware issue??