FileOnePasser,it can add password to any files on your computer. When a file has be done with it, then if you open the file,it will ask you to write password,if the password you write is right, it will open the file direct regardless the file is on your disk.But if it is not right, you can do or see nothing. So, files on your disk will be very safety. It is defferent from other file security softwares. Others can not run the file direct, but only release the file in a folder,you will open the release file too. But this software can open it direct, I think this is a very good function. When you use it, you will love it, I think.