From the developer: "In this age of snoopers and hackers, you never know who might be looking into your computer and everything on it. It's not just evil-minded people you need to worry about. If you share a computer at home with your family, you might want to keep some files or folders private. And in the office you may also be worried that co-workers could take a look now and then.
"With DreadLock Privacy no one--well-intentioned or not--can snoop into what you're doing. DreadLock Privacy is a tray-based tool that allows you to instantly hide or close any or all of the windows that are opened on your screen. This provides a method of protecting sensitive information that you may not want others to see. DreadLock Privacy is invoked by using a predefined system hotkey that is recognized as long as DreadLock is running. In addition, you can specify an application or a document that DreadLock will launch as a decoy whenever DreadLock is invoked."