Quick PC techie question

[goldfazer]

If you use a proper program (I used to use eraser) it writes to each byte several times with a different pattern, as the 'real' pros can actually detect what the value 'used' to be. But that's a bit excessive. Now I just put 'em on the fire for a bit, or use the lumop hammer as by the time I get rid of them they're old enough to be ridiculously small by current standards.