New guy to the CCleaner forum. Howdy.
I added CCleaner due to the recommendation in the book WikiLeaks by The Guradian's Leigh and Harding, that all who communicate using the interned have access to and use Secure Socket Layer, Pretty Good Privacy, The Onion router Net and a DRIVE WIPER. No, you won't find all that 'recommendation' in one paragraph, but ... read the book.
How long should it take to wipe free space? Yes, a complicated answer is implied by various file systems, disk speeds, processor speed and file arrangement. How long is a reasonable time to wait?
Thanks to all that help. God save the Japanese and the Fukushima NPP workers.