Hello all, Been trying to troubleshoot a friend's MacBook for hours now. I've found out that it's a kernel panic by booting into verbose mode. Basically, the MacBook won't boot into OS X. It also won't read the OS X install disc to allow me to do a fresh install. It gets stuck at that screen when it says you have to restart your Mac. Stuff I've tried: 1. It's not a memory issue, I've replaced the memory with the sticks from my own MacBook, and they're working. 2. I've tried booting into single user mode to do /sbin/fsck -fy, it claims the hard disk is fine. 3. The install disc is fine, I've just booted from it on my own MacBook. 4. Both MacBooks are C2D ones, so it's definitely not an OS X version problem with the install disc. Interestingly, this MacBook has Boot Camp and Windows XP installed, and Windows won't boot either! Apparently it's missing a hal.dll file, which I've tried to replace with no success. I've tried doing a repair installation of Windows XP first, but setup hangs when it detects the MacBook's wireless card (possibly due to the fact I'm doing a repair, plus I've installed Apple's Windows drivers previously). I'm really at my wit's end, and any help would be greatly appreciated. Thanks.