Use Hide All to get rid of windows that you need open, but don't use all the time so that they don't clutter your taskbar, for instance, email clients, management utilities, etc. Hide All also allows you to hide all your desktop icons as well as the Windows taskbar. You can also hide the application itself so that it isn't visible as well. When you want Hide All to be visible again simple hold down control and tap H .....(free).....