New hard disk drive being added
If you are attempting to add a new hard disk drive to the computer make sure that drive is a blank drive. Adding a new hard disk drive to a computer that already has Windows installed on it may cause the NTLDR error to occur.
If you are unsure if the new drive is blank or not try booting from a bootable diskette and format the new hard disk drive.
text taken from link.
to format drive right click "my computer" select manege, right click the drive select format..