I've just downloaded CCleaner, and it worked fine for everything i wanted to do but the double files search and destroy functionnality, that seems important enough to me to make this topic.
I've tried not to include my windows partition, but it didn't worked either, nor with the "run as administrator" .
It just find all the doublons and when i try to delete them, it says "Some files may not have been deleted" (translated from french, not sure what is the original text) and when i drop me back in the list of all the double files, none is deleted.
Please tell me how to fix this problem if someone knows how to, it would be a big help to me.
The error message (in french)