Sorry to hear that.
Download and install HDD recovery update tool version 188.8.131.52 or later from the link below:
Check if you still get the same error.
Keep me posted.
This is a common HDD issue with Toshiba laptop running on Windows 7. See:
If you bought the laptop recently, I would advise you to take it back to the retailer and ask them to either fix this issue or replace the laptop, as this is likely to be a hardware issue.