I was given an old iMac from my work and i wanted to do a complete re-install of everything. Ended up following a YouTube clip to delete everything and I ended up erasing the Macintosh HD in Recovery mode and now im forever stuck in MAC OS X UTILITIES. It wont let me reinstall Lion from the option, as it gets to the Apple ID login then gives an error. Iv also tried booting from USB and also from a Boot CD but on this is says the installation cannot be completed. The system was working fine until I started this failed mission! Couple of other things: HD is verified and is ok, so I don't think any problem there. Macintosh HD doesn't appear in Start up disk, only the Boot CD (but has the failed problem listed above). Help is needed please! Im stuck for ideas. Thanks.