http://www.microsoft.com/business/smb/en-au/harddrive.mspx
This may help
I think Number 3 is the best solution.
Alway Number 3.
Each to their own I guess.3. Buy Software and Overwrite the Disk, Again and Again and Again
If you don't know much about computers, this might be easier than Step 2
Alway Number 3.
Each to their own I guess.3. Buy Software and Overwrite the Disk, Again and Again and Again
If you don't know much about computers, this might be easier than Step 2