|The hard drive must be tested to see if it has failed.|
Download the hard drive maker's diagnostic software for DOS from the appropriate link here: http://www.tacktech.com/display.cfm...
The download is (or includes) an ISO CD-image file. Now download IMGBurn from here: http://filehippo.com/download_imgburn/ and use it to create a CD from the ISO file. Now boot your laptop from that CD to test the drive.
If the test has the option to run a "long" or "extended" test, run that.