Thanks for the update, Tabita.
When the crosshair appears at the bottom of the screen, are you able to completely see them in the screen? We're thinking that the screen resolution does not exactly fit on your device.
Upon trying to find a few info about your device, we found out that you have a
10.1 inch screen, and the best Resolution for this is
1280x800 pixels.
--->You can set it under Settings > System > Display > Resolution: Change it to
1280x800 pixels
Another info is while you're in Tablet mode, it should automatically turn on the
screen rotation feature. While performing the calibration, try to rotate your tablet 180° and check if you will be able to touch the crosshair at the bottom.
If this works, we would expect that the crosshairs that will at the top will not respond.
This is to determine an area of the Touchscreen is not working. After determining it, you will need to contact your device maker support team for them to advise you what to do next.
Please feel free to keep us updated.