It is a hard disk hardware failure problem.
Remove your failing HDD and put in a new one and reinstall Window on the new HDD.
Connect your failing HDD and access it and see if you can pull the files you need out before it fail again.
If it doesn't work then you need data recovery service.
Not the lame data recovery program which spammers on this forum post. But actually a data recovery service where the technical physically open the HDD, take the platter out and scavenge whatever data that is left on the HDD.
Of course if you have a backup copy, all of this wouldn't be necessary. I suggest you always have a backup on a different HDD in the future.