Another freeware that you may find useful in protect your important folder.
Free Hide Folder
http://www.snapfiles.com/get/freehidefolder.html
Free Hide Folder allows you to hide important folders from unauthorized access.
Once the folder is hidden, they are no longer visible from Windows Explorer. No one will know the folders exist.
Even you access the folders by command line, they could not be seen.
The software provides a password protected interface for you to change the hide/show status of the folders. You can change the hide/show status of one or more folders.