|Depends on what is wrong. If the drive is defective it can't be fixed for the most part. If only some data is missing it might be fixed.|
I's say get the data off using a live cd if you need anything on it before you go farther.
There are some good hard drive diags out there. The one for that brand might support extra features. See ultimate boot cd for general tests. Dell might even offer some.
Be sure you know how to recover the OEM data if it is on the drive also. You might need to order media.
If the drive tests show the hd is bad then your only choice is to replace and reload.
I read it wrong and answer it wrong too. So get off my case you peanut.