|Dell may be able to supply you, for a fee, disks that will contain everything that originally came from the manufacturer.|
When contacting them you may wish to ask if a larger capacity hard drive will also work in the laptop.
You will need the service tag number off the bottom of the unit.
Is this laptop still under warranty?
If not, I would still try the utility I told you about in #3. The manufacturer of the drive is the final authority. There are two components that make the drive work. One is the drive itself. The other is the SATA controller that is part of the motherboard. Either one could give the error you indicate. If the controller is gone you may not want to repair the laptop due to the cost. That would be a new motherboard and still possibly the hard drive. I am not saying that is what is wrong. The fitness test might not be able to determine that either. Not that big a deal to make the CDR and then boot to it.