(Sorry for my bad english!)
for some locations often is useless to undelete and users do not search for files in that locations.
e.g.: %appdata%\(...)temporary internet files
or %systemdrive%\%temp%
or %systemdrive%\%tmp%
and so on...
It would be great for the user to edit a list of path for exclusion.
Then when start scanning, a thick selection "use exclusions" (yes/no) ...
in the list, recuva can guide/help user with the typical paths useless to undeletion
i hope in a wipe option too!
"wipe free space"
or, after the list of the recoverable files, select what file(s) to delete with easy to use selections ... and wipe!
i suggest some testing AFTER wipe, useful also with third party wipe programs.
(sorry for my bad english)
I've tried this test:
i used "disk redactor" ( http://www.cezeo.com/products/disk-redactor/ ) for wiping my system hard disk (selecting "no last 16K wipe") ... this tool simply writes a big file as huge as the free space at the moment is.
Then i used recuva that listed a lot of files that can be recovered at "excellent" state... obviously that's not true: the whole of the space was overwritten.
That tool is only one of many of these available in the net (freely).
Bye!