Defect hard drives are one of the most important sources of problems, including performance problems.
On a external hard drive, some documents mey be impossible to open or may disappear. On an internal hard drive, the computer can become slow, sometimes without warning and it can even get almost unusable. It may also take more than 10 minutes to boot or not boot at all. You may also hear a metallic sound, "tic tic tic".
It is imperative to check the status of your hard drive if you see these symptoms, especially if your have no backup of your PC
If your hard drive is defect, you should immediately recover data
and replace the hard drive.