http://www.newsoftwares.net/folderlock/features

You create Encrypted storages to keep your important files encrypted. These storage 'Lockers' are dynamic, smaller in size when created and grow as your need increases. All the data remains encrypted even when you are accessing your files. Decryption process takes place in memory leaving no traces or recoverability of the file on your system

Auto Protection setting allows you to set duration of inactivity on your PC to perform certain tasks while the application is running. The setting provides several data protection options like Closing Lockers, Logging out from various other features when the duration of inactivity is over. Furthermore, you can set the application to Exit, Log Off PC , or Shutdown the PC. This setting is useful if you fear access to your files while you're away from your PC at home or office.