yup thats about it.. just for safety you should back up your files to an external HDD or a usb drive only the important stuff.
there are still other methods to try, which involves doing things in the bios and windows programs... but its pretty safe to say your hard drive is dying.. in a sense, because most HDD dont fail outright they just continually degrade in performance.
copying the files also means reading from the disk and pasting the files in-turns writes on the disk,
but I may still be wrong, so the only course of action is to get another hard disk, replace the old one, install windows on it then see if the problem persist. well.. if the problem did persist even by replacing the drive then that would be far worst.
if your not comfortable with replacing parts on your laptop, best to send it to a technician.
as for my diagnosis of what happened, your HDD had frequent power failure maybe due to the power options constantly turning the hard drive off to save power causing header-crash, which means the drive is spinning 5000rpms then abruptly stopping, causing damage. well its kinda hard to pinpoint what exactly is causing this, but thats the general reason behind it.
you can still try to re-install windows and check if it will solve this, but if not....