Wipe free space does not.

CCleaner for Windows CCleaner Windows Bug Reporting
1

Does not wipe free space completely, that is.

I have two 960EVO nvme in RAID0.

Using wipe free space stops before completion. CCleaner causes the PC to lock up, forcing hard reset.

At most, it sometimes reaches 70%, most often it stops around 25% - 30%.

W7U x64 SP1.

2

So, since no-one replied, I solved it myself.

3

why would you want/need to wipe the free space on a SSD?

4

And if you've solved it, please tell us how so we can become just a fraction more knowledgeable.