CCleaner wiping free space

If I am looking to overwrite files which have already been deleted, wiping free space would be the way to do this, am I correct?

I have read posts about how if the wipe is interrupted, the overwrite file will remain on your drive and take up all your space. This seemed to be a concern for some people. But in that situation, you would be able to remove that file and get your space back with a simple delete, right? Or is it more complicted than that?

I am using Windows 7 btw.

Yes, WFS - and Wipe MFT - is the way to do it.

I think that current versions of CC are intended to delete the large file(s) that it uses for overwrites on cancellation or on a rerun (I'm not sure on this as I don't run WFS). However the file can easily be identified and deleted if necessary. It's a large random-named file on the root directory with a creation date of the CC run.

Just for info, I've carried out a few tests on my Windows XP machine (my only machine), and deliberately interrupted the WFS - and Wipe MFT processes.

On every occasion, the temp file/s were immediately deleted. Obviously I can only speak for my own situation but the delete of the temp file/s was consistent.

Yes you can go ahed ad do the wipe. It will work.