Wiping a computer.

[Mr SJE]

I have 2 laptops, both are ready to go on eBay, but they need their hard drives/memory completely erasing. Both are on Windows 7.

Can anyone recommend a good way of going about this? Is there a program that can do this or something like that?

Thanks in advance

EDIT:

CLOSE THIS PLEASE! FOUND A WAY - DBAN