On start-up the only screen available is the OS X Utilites screen with 4 options: Restore from Time Machine Reinstall OS X Get Help Online Disk Utility When repairing the disk.. I'm getting the "invalid B-tree node size Can I get my data back from this position?? Can I back up from this position? I can't download Warrior or Stellar because I have no access to anything. Safari only. Can't save anything, download anything, access anything. I moved offices in March 14. I haven't backed up since then. (I know!) So all the work I've done is on my hard drive. Every picture I've taken this year is on my hard drive. I'm a muppet I know.. but I can't be completely daft..because I'm here and I've found you guys!! Please help me get ALL the work back that I've done for this company since March!!