Heres a solution, zip it up and password protect it. Its more secure than the 3rd party solutions as those can be easily circumvented by other 3rd party explorer/viewers like Ulead Photo Explorer, going into dos, using another os, etc. The zip method is better because its not going to be exposed accidently and will have to take some knowledge and time to crack a password protected zip file, plus you should be able to drag and drop into the protected zip file then delete the original files, get a program like eraser 5.1 that will shred your original files for additional paranoid protection.