CCleaner 4 windows does not wipe anything from the disk

[Bayernjoerg]

When I wipe the free space from a disk, CCleaner does not wipe anything from the disk. It does not matter, how many passes I choose, I can recover many files, what are even not erased. Not overwritten, not erased, nothing.

Any idea?

many thanks, Joerg

[Andavari]

Something to try is right-click the CCleaner icon and choose to 'Run as administrator', which will subsequently make it produce a UAC prompt meaning it will have elevated privileges on the system.

For whatever reason I have to do just that and have permanently modified the desktop icon/shortcut to always run it with 'Run as administrator' in order for it to delete some things in Win10 it otherwise wouldn't be able to.

Also the 'Skip User Account Control Warning' located in 'Options > Advanced' doesn't seem to matter anymore, at least in my case.