FileShield

FileShield, from Permission Research, lets you easily encrypt and decrypt specified files and folders using just one password. Once locked, these files and folders cannot be deleted or moved.
FileShield will store files and folders locally on your computer in its own FileShield folder.
Although this FileShield folder can be seen through Windows Explorer, its contents cant be viewed unless unlocked with your unique password. When using your computer, you can lock or unlock the FileShield folder as needed.
As an additional measure of security, the folder can be automatically locked after a period of time that you specify, or whenever you shut down your PC.
Adding files to your secure FileShield folder is a breeze - simply drag and drop items into the unlocked folder, then lock to protect the files. Removing files is just as easy once your password-protected FileShield folder has been unlocked.