We now have a new top pick, AxCrypt, selected for Best Free File Encryption
Utility. Using AxCrypt is wonderfully simple. To encrypt a file or folder,
just right-click it and select "encrypt". Double-clicking an encrypted file
lets you edit or view it with the program of your choice. Closing an open
file automatically re-encrypts the file. What a time saver!
http://www.techsupportalert.com/best-free-file-encryption-utility.htm