I would run diagnostics on the hard drive by downloading the diagnostic tool for the hard drive brand and making a bootable disc.
Hard Drive Diagnostics Tools and Utilities (Storage) - TACKtech Corp.
See this for how to make a bootable cd:
http://www.techsupportforum.com/forums/f149/how-to-burn-a-bootable-iso-file-341778.html
Hard Drive Diagnostics Tools and Utilities (Storage) - TACKtech Corp.
See this for how to make a bootable cd:
http://www.techsupportforum.com/forums/f149/how-to-burn-a-bootable-iso-file-341778.html