Sofonica Folder Soldier is a free software that can protect folders by letting you hide folders in one click. Sofonica Folder Soldier can hide unlimited number of folders, and you can make them visible by entering your pre-defined password. This is even better than just password protecting folders, as this folder protection software hides them as well.
When you install Sofonica Folder Soldier, it asks you to define a password. After that, you can choose the folders that you want to hide, and Sofonica Folder Soldier will immediately hide them. If you want to show the folders again, you have to re-enter the password.
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Sofonica Folder Soldier comes with a very interesting feature. It comes with an uninstall guard that does not lets anyone uninstall this software. Even uninstallation requires password. This provides an additional layer of protection.
Sofonica Folder Soldier comes especially handy when same PC is shared among multiple people. In that case, you can just hide your folders so that other people who use that computer cannot access your data.
Other free data protection software include Folders Hidden, Secret Disk, and Prevent.