Used HideDragon for Windows?
Editors’ Review
HideDragon lets you instantly hide all or selected windows on your desktop and then bring them back up again with just the click of a button. No matter what you're trying to hide or from whom, this program will take care of everything for you.
Pros
Basic mechanics: This program performs a basic set of operations well. With just the click of a mouse button or the tap of a hot key, it will hide all of the windows you specify, and it can even hide their icons in the system tray as well. Brining the windows back up is just as easy, and you can do it whenever you're ready.
Password protection: If you feel you need an additional level of security, you can add password protection to the program as well. That means even someone who discovers or accidentally presses your hot key won't be able to access the hidden windows.
Cons
Awkward interface: The main interface is a little awkwardly set up, and it can take some time to locate all program features. There is a Help document as well, but it doesn't explain things terribly clearly at times.
Bottom Line
HideDragon is a straightforward and effective free program for hiding anything on your screen at any time that you don't want anyone else to see. It can take a little experimentation to master all of the features, but even those with little computer experience shouldn't have too much trouble.
What’s new in version 4.7
Explore More

Quick Hide IP
Trial versionJAAScois PC Monitor
Trial versionNetDog Internet Porn Filter
Trial version
iSam (32-bit)
FreeBrytersoft History Cleaner (64-bit)
Trial versionArcaVir Internet Security
Trial version
Quick Hide IP Platinum
Trial version
Web Services Enhancements 3.0 Hands On Lab - Exploring Security
FreeNorton Confidential
Trial versionSoftware Fortress
Trial versionA.L.A.R.M. - A Laptop A/C Removal Monitor
FreeiNetWatcher
Trial version