I believe dicke's suggestion to retire your computer is very much premature.
Have you run chkdsk /r? If not, I would suggest doing this.
Chkdsk /r checks for bad sectors on the hdd and recovers any readable information.
Click on the Start orb and type in cmd in the Search programs and files box. When cmd is seen in Programs above the Search box right click on it, then click on Run as administrator.
You will see a screen similar to the one below.
Type in chkdsk c:/r then press Enter. Please notice the space between the chkdsk and the /r.
You will receieve the message "CHKDSK cannot be run because it is in use by another process. Would you like to schedule this volume to be checked the next time the system restarts? <Y/N>".
Type in Y and press Enter.
Restart your computer to start the scan.
This will take a while to run, please be patient and allow it to complete the scan.