That error message is generally the sign of a failing harddrive or faulty operating system caused by a faulty hardware issue such as the harddrive has failed or the motherboard controller is failing. Most times it is because of bad sectors and lost data.

If possible slave the harddrive to another computer and run a

chkdsk /r or chkdsk /r /f

where r = locates bad sectors and tries to recover lost data

and f = fixes the disc