Vista comes with a lot of easter eggs and some of them use screensavers to get activated.
Remember the cool swirling colorful screensaver in Mac OSes?
This same type of screensaver (Aero screensavers in Vista) can be set as a desktop background using the easter eggs.
I will show the most common ones in Vista.Do note that the activated easter eggs will lock the access to Windows desktop (with desktop icons vanished)and they can be terminated anytime using the Alt + F4 key or from task manager by ending the associated .scr process.
Open command prompt (Start > Run > cmd)with administrator privileges.
Go to Windowssystem32 directory.
Type the following each for a different easter egg:
1. ribbons.scr /p65552
2. aurora.scr /p65552
3. bubbles.scr /p65552
4. mystify.scr /p65552
The interesting thing here is when this is done on a dual display system with extended desktop.The primary display will have the easter egg active while the secondary display will still have the original Vista wallpaper.
Feel free to mess around with these eggs,they are very cool.
Peace.