To run a system from the UI, all you need to do is either double-click it with your mouse or use the arrow keys to highlight it and press the "Enter" key. If the system requires software, then a second list will appear with the available software in it. If you don't want to run any software, then you can select "Start Empty" from the top of the list. Finally, if you right-click a system, the "Configure Machine" window will open which allows you to change the systems settings. Click here to open the "Configure Machine" page.