Hey guys I have a question. Do i have a defective snow leopard disk or is it my comp? The snow leopard disk is the retail 30 dollar copy. I bought it the day it was released. Up until now, ive been using my "free upgrade" version from apple and that always worked. i tried reformatting my comp but for some reason i get a kernel panic. Once i take out the CD it boots up fine. This happened with a 2010 macbook pro, also with a brand new 2011 15 macbook pro, and now a 2011 13 macbook pro. could my disk be defective? I get the kernel panic every time i try to reinstall snow leopard. I tried holding c and doing it from there and i tried when i choose to install from my homescreen. both end in a kernel panic.my luck cant be THAT bad that all three computers have messed up superdrives or something.