So I restarted my iMac to finish the update only to find a kernel panic. Can I basically reinstall Lion without affecting any installation so it will be exactly how it was before this error? It's highly important that I have my computer up and running again by this afternoon. Disc utility already determined that there is nothing wrong with my disc so it's the update that screwed it up. I don't have a time-machine backup. sorry couldn't shrink the picture since I had to do it quickly with my phone.