Dell hard drives have a hidden partition with an image of the system that is used to recover/reinstall the Operating System. A new drive will not have that image. You will have to go to Dell for help with replacing a hard drive.
FWIW to XP users: When you click on the 'Command Prompt' you are just causing the 'Command prompt' to be displayed. This prompt gives you access to NTVDM.EXE, the 'NT Virtual DOS Manager'.
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