Windows 7 has a nice Window Shake Feature which i feel is a useful one if you work accross many windows. So what this feature is. When you have many windows open and you want to have only OR need to focus on only one window, Just select the window and shake it gently left-right manner. Doing this all the other windows disappear or minimize. If you want the Previous state back again Just shake it gently again left-right… and it back as it was. Really nice feature of Windows 7.