Disk First Aid is giving me a message: I've got an invalid PEOF. I was able to find a little information at apple.com's troubleshooting site -- the problem has to do with the way data is stored. Their advice is to reinstall the system software. I tried that, but I'm still getting the same message.
I gotten by this long without buying Norton Utilities. Is is time, or is there a better way?
Thanks, and happy holidays!