The StartMeStick includes two screen keyboards.
Screen Keyboard #1
Turn on this screen keyboard by clicking on Start button, then Settings, then Universal Access. In this Universal Access window you will see a section titled Typing, and within this Typing section you can turn on/off the Screen Keyboard.
To actually see and use this screen keyboard, you then have to launch a program that is keystroke focused, e.g. Text Editor.
Screen Keyboard #2
Turn on this screen keyboard by opening a command prompt (i.e. a terminal). To open a terminal click on the Start button, then click Terminal.
Inside the terminal, enter the command 'onboard', and press enter.
This screen keyboard will appear immediately, and you can use it in any program, e.g. Chromium. You can simply click the close button (the 'X') in the top right of the terminal window when you are finished using this screen keyboard.