Re: Selling Laptops
Obviously reset the machines back to the state they were in when you first got them using the laptop's own recovery system.
Then personally I would download a sizable video file and then cut and paste it rpeatedly until the hard disk is completely filled up.
You can do this progressively i.e.
After first cut and paste you have 2 video files
Highlight both then cut paste again = 4 files
Hightlight 4, cut and paste = 8
and so on
1,2,4,8,16,32,64 etc
It will quickly ramp up.
Doing this will ensure that your hard drive is completely overwritten so that no "undelete" software can be used to see your previous details.