Hey Everyone! My MBP is looping on start-up. It goes to the white screen with the apple logo and that little wheel made of grey lines. It just keeps spinning then after 30-60 seconds, it shuts down and restarts only do do the same thing again. Any idea how I can fix this? I think I may have accidently deleted some system files. The last thing I was doing was deleting things from my Hard Drive. Any help would be great! Thanks!