Hello, Yesterday i installed Ice Clean and ran a few of the maintenance procedures. This morning when i tried starting my laptop, it started with grey screen and apple symbol, then black screen with white text stating; Mar 13 08:02:44 launchd: can't exec /bin/sh for single user : no such file or directory. Please help! I tried contacting Ice Clean, they claim it is not related. I checked my system profile and i thought i had 1gb of RAM it only says 512gb. could a RAM failure cause this problem? Have started using target disk mode with my old faithful G4 and everything on the hard disk is still intact. Ran disk utility and all ok! Thanks for your time.