The visualizer can be started in a numnber of ways.

Screensaver

For Windows 7

• On the desktop right click and choose 'personalize'
• Select screensaver in lower right
• Select Plane9
• Set a good wait time so you dont have to wait too long for the screensaver to activate
• Wait for the screensaver to become active

Standalone window

This will show a standalone window that is always topmost

• On the start menu->Programs->Plane9->Plane9 window