I seem to be having a problem using the secure delete feature of CCleaner. If I select this option with either 1, 3 or 7 passes CCleaner fails with an unknown error. Normal file deletion seems to work.
I installed CCleaner on a fresh install of XP SP2 + hotfixes. I have also tried removing CCleaner, cleaning the registry and reinstalling, with the same result.
This happens with my installation also, but only when attempting to clean zero-bytes files. If I manually delete (or erase, with Eraser) any of these, CCleaner works ok.
Example: In a limewire "incomplete" (downloads initially go here) folder, sometimes the file can't be downloaded at all. It leaves an entry of the attempted download, which is a zero byte file. (It's something, but less than can be read.) If I then try and clean the folder, bingo CCleaner has encountered a problem and needs to close. Sorry....