Restoring your Mac Book

I recently attempted to restore my mac book per the nstructions. I tried to erase and restore using the disk utility at the start up by holding the command and R key. When I tried to erase the 500.11 media drive I received an erro, could not dismount drive. I the erased the MAC HD drive and then tried to re-install OS X Lion and received an error as well. Any Ideas, advice, help?

Not So Lucky Ned?
I tried to erase and restore using the disk utility at the start up by holding the command and R key.
When you do this your booting from a hidden partition at the bottom of the same drive.
When I tried to erase the 500.11 media drive I received an error, could not dismount drive.
Right, because you can't erase the entire drive while booted from any partition on the drive.
I the erased the MAC HD drive...
Right you can do that.
...and then tried to re-install OS X Lion and received an error as well.
Ok, quit the Lion installer and Open Disk Utility again and select the Macinstosh HD partition.
Now click the Erase and use the middle/right selection and click erase, it will take a bit to complete.
When finished, quit Disk Utility and log onto your Internet or use a Ethernet cable to the router or modem. You will need a fast, relaible Internet connection, or else take it to someplace you can.
You will need your AppleID and password.
Here is the instructions for installing OSX, including restoring your free iLife programs.
https://support.apple.com/kb/HT4718

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