The program works like a safe. Drag and drop files or folders in it and then assign a password. From then on, only people who know the password will be able to access those files in the virtual safe.
The first thing you'll do when installing the program will be to set a password that will be complsory both to open folders and uninstall the program, so don't forget it. If you are worried about your privacy and want to keep files safe, Password Folder can be an easy way to do it.