No, I apologize as I must have misread your post, my kids were going nuts, and I was typing stupid. You will need your original install disk, then do all the updates. Very, very, sorry for the incorrect info, and any inconvenience. Power down, put the install disk in the slot, and power up holding the C key, if this does not take you to the the language pane, you might have a failing drive. If it does boot try to a back up, and take it to the Apple store for a diagnosis.
No problem. I thought that was the case, but was just checking to make sure. I'm in college and stupidly left my boot disk at home some 800 miles away. My girlfriend's computer has 10.7, so doesn't have a boot disk and I was going to follow something I found and make my own, but hers came with it installed, not purchased, so I can't find anyway to access the 10.7 installer on here. Anyone have any ideas if there's any way I can get around this? If not I already made a genius appointment for tomorrow if nothing works by then.
I'm no expert, but following what others have posted about similar problems, I booted using CMD + Shift + V, and the last few lines contain things such as:
Keys out of order (4,7898)
Rebuilding catalog B-tree
The volume Macintosh HD could not be repaired
You have directory damage. If you continue to use your computer you will have further damage which only the repair shop can repair.
You will need to get hold of your system discs that came with your computer and do the following -
Disconnect all peripherals from your computer.
Boot from your install disc & run Repair Disk from the utility menu. To use the Install Mac OS X disc, insert the disc, and restart your computer while holding down the C key as it starts up.
Select your language.
Once on the desktop, select Utility in the menu bar.
Select Disk Utility.
Select the disk or volume in the list of disks and volumes, and then click First Aid.
Click Repair Disk.
Restart your computer when done.
Repair permissions after you reach the desktop-http://support.apple.com/kb/HT2963 and restart your computer.
If repairing the disk does not work, you will need a stronger utility. Here are a few -
DiskWarrior Highly recommended for *directory damage* repairs.
TechTool Pro Multi-functional utility.
Drive Genius Multi-functional utility.