Hard disk failures are the most common computer hardware problems. And laptop hard disks fail more often than desktop HDs. If you knock hard or drop your laptop even a few inches while it’s working, you may damage the HD.

Common Hard Disk Failure Symptoms: 

The laptop starts as usual but when Windows starts to load it goes to blue screen or other error messages. In over 50% of the cases these errors indicate that the HD is starting to go bad and is probably developing bad sectors. 

The laptop starts as usual but Windows freezes on the initial Boot screen and you can hear feint but continuous clicking sound.  

As soon as the laptop is started there are loud clicks or grinding sounds and Windows doesn’t load. 

Shortly after starting the laptop a message appears (usually on a black screen) “SMART test failed. Backup your data immediately and replace the hard disk” or similar. Well, that says it all. S.M.A.R.T. is a self-test that is build into the hard disk. 

'Missing bootable device' or 'Disk Boot Failure' message appears after switching on the laptop.  

All above symptoms indicate that your laptop hard disk is damaged and need to be replaced.