|Use a drive fitness test from the manufacturer of the hard drive. In your case I would guess that to be Hitachi. If the drive fails the test then replace it.|
If you don't have restore disks you MAY still be able to create them from the hidden partition on the current hard drive.
Read the laptop manual to learn how to make the restore set.
You need to pay attention to the capacity of the replacement hard drive. There are more constraints on laptops than with desktops.