November 21, 2015, 01:23:20 am
Please check that the Lumion Setting for Toggle Tablet Input is not On (not green).
Are you able to travel the camera left and right using the Navigation keys OK, and also in High Speed using the Shift key with navigation, and Super Speed with Space + Shift + navigation keys?
Otherwise if there are no other devices interfering, then it sounds like you are experiencing lag on the screen which is a hardware suitability for Lumion issue.
Attach to a post your DXDiag Report (Files -> click on Summary Chart -> Run DXDiag). Once the report is run it will save to a folder on your PC as a txt file, so attach that file.