HideWin

Well, okay... so you probably shouldn´t be browsing at work, or looking at any compromising pages; but if you just cannot help yourself, try using this program. The application allows you to set hotkeys, or shortcut keys, to instantly hide all your windows. Also, you can use a key or a combination of keys for each type of window. The program occupies only 30 KB of space when uncompressed, requires no installation, and is completely free.