I am in the middle of a "drive wiper > wipe free space" wipe, and the "properties" of my drive C reveal that I have very little "free space" (15.7 gb out of 889 GB) compared to before (over 400 GB free space) I had started the wipe (multiple passes). Is this normal, and should I be alarmed? I was under the impression that I would not lose any free space, that the CCleaner just checks the free space for data that hasn't been overwritten. Thanks!