I see you have a Samsung 840 Pro SSD. There is a firmware update available that may resolve your problem.
Download and install the Samsung Magician software here:
http://ssd.samsungsemi.com/ecomobile/ssd/update1.do?fname=/Samsung_Magician_Setup_v46.zip
In Samsung Magician, check for and install the available firmware update (should be DXM06B0Q).
Since you have been experiencing problems with your drive, make sure you have a good backup of any important data on your computer.