Is the keyboard attached when you turn it on? If so try turn it off and back on without the keyboard. You can always try and plug in a mouse to see if you can log in and then test the touch screen from the desktop.
If you can log in try download one of the driver packages here and see if it helps. http://www.linxtablet.co.uk/page.php?p=w10premium&sid=9be9698436753ef3e1d7eb1b1d05ae78