HD volume will not fully erase.

[HelloMac]

Using Disk Utility, Erase, Zero out, my single partition HD will not completely erase.

I've attempted it at least seven times over ther past two months under the direction of AppleCare and my local Apple Genius.

The hardware has been completely check out by Apple tech within the past month.

At the end of the erase procedure I'm presented with a HD volume with the new name and am told that there are three folder and three files on the disc using 107 meg of space. It's the same each time.

I continue to have problems with the system with unknown users being able to make changes to my computer and access files via the internet.

How can I nuke those remaining three files?

A full explantation is in the Unix forum: http://macosx.com/forums/unix-x11/300617-munix-hacked-valid-files-install-leopard.html