I am afraid your laptop's hard disk is failing hard. The only thing that might help is a complete CHKDSK check ("Scan for and attempt recovery of bad sectors"), preferably by removing it from the laptop and attaching it to a working PC via a 2.5" to 3.5" IDE adaptor or via a good USB disk enclosure.
If the disk is successfully checked then you can clone it immediately on a new 2.5" hard disk and put it in the laptop. If you are lucky, the system files might be intact and you will have saved your Windows installation and your data.
If the disk fails CHKDSK, then you have to give up and make a full Windows install on a new hard disk. If you need data from the old hard disk, you can attach it to the laptop via a USB enclosure and you might get all or part of your data. Good luck!