Sometimes the best way to keep people from prying into your personal folders is to keep the folders' existence secret from the get-go. That's easy to do with Free Hide Folders. The program lets you make any folder (plus all of its sub folders and other contents) completely invisible with a just a little pointing and clicking. (And no, it doesn't just use the folder's hidden attribute.) The program is password protected, so you're safe even if someone knows you're using the product. It also lets you back up your folders' hidden states in case you have a system problem. Its a totally free software. Make your personal data totally personal.

Information taken from PC World.