Basically, I have someone deleting files on my computer without my permission, and I don't like it. I've managed to find and restore all of my files, however it seems this person is deleting, in particular, songs and videos that they don't like. This is MY computer, which I share with other people because I'm nice, but I don't like this invasion of privacy. How can I make it so that no files on my computer can be deleted without a specific password, and is it possible to lock the recycling bin so that people can't clean it out in case they manage to delete a file?