Hide all PC windows fast

You can quickly hide all the windows on your screen in XP, and see only your desktop wallpaper, by pressing Windows Key+D on your keyboard. (The windows key is usually between Ctrl and Alt)

This is great if someone comes in when you are looking at something you don't want them to see.

Great tip! I already knew this one, but it is a great tool when working in an office, and the boss walks in while plating a game!

This is VERY useful, since I usually have 20 windows open at once, and can't be bothered hiding them all manually whenever someone visits my desk.

Cool, though not usefull for me, its very cool for when I just want to go straingh to the desktop for some reason.
I have to try that on the weird computers that can only have one window open at a time, and its literally the desktop!