Mac wont start after download

After my computer wasnt starting i put in the disc and repaired my disk by deleting all my files therefore my mac needed to reinstall lion but after it finishes downloading it just goes back to the disc utilites menu... HELP

Did you erase your internal drive? What 'disc' did you use? Did you boot into your Recovery partition, use Disk Utility to reformat your boot partition and install Lion via the Internet recovery?
Need a little more information...
Clinton

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