Hi Everyone My Macbook Pro is hanging at the initial grey screen with the apple logo. It won't load beyond that. It first started after installing Symantec Anti virus, which included a Security Update. -Holding down any of the start up keys does nothing, with the exception of "Verbose" mode which freezes at" .....Error reading file ApplePCCard16ATA.kext" and I can't type any commands. -It will not load up the recovery CD -Loading it into Target Mode with another Macbook, I can see the HD of the broken mac, but after opening it I can't get beyond one level (i.e. I can see the items like "system" and "applications" and whatnot, but opening any folder doesn't load. -I checked the disk with disk utility in Target Mode, but it took a long time (>15minutes it was still thinking so I turned it off). Any ideas of what to do? Thanks, Update 1: Reset NVRAM Took out battery and held down power button (still nothing) Whenever I look at the broken HD from the other working computer, the working mac just goes to the beachball and doesn't progress beyond.