Paranoia?
Personally,I`ve never tried to recover any erased files or HD free space data,as I feel that my only need is to prevent any casual snooping on the contents of my computer that I feel to be of no businees whatsoever of theirs. For this,I reckon a carefully used Eraser,plus one or two other clean up applications and a modicum of occasional file encryption will suffice-especially as I have no criminal intentions,state secrets or highly valuable commercial data on my humble machine!I do sometimes feel a little paranoia creeps into these august columns,especially after Garrets comments elswhere implying that absolute surety of the total erasing of HD data is very hard to achieve.