Normally to change between windows you would have to click your mouse, but there is a feature in Vista that lets you set your mouse so it will change windows just by hovering over it.  To set this up just follow these points;

  • Open control panel
  • Click ease of access
  • Click ease of access center
  • Open Make the mouse easier to use
  • Select the box Activate a window by hovering over it with the mouse
  • Save this
  • Done
Activate Windows by Hovering