Hi @mrmauz,
Please try following the instructions below:
-Connect your Android viewer to your primary machine.
-Go to Control Panel and search for „Touch“, Click „Tablet PC Settings“ or just Click Winkey + R, then type „control /name Microsoft.TabletPCSettings“
-There’s a dropdown box for connected displays. Try to check both displays and see if you can click the Reset button for both displays. If you have clicked it, click „ok“ then check if the issue is still happening. If yes, please proceed to the next step.
-Click „Setup…“
-A prompt will appear; please choose „Touch input.“
-You should now see instructions on your monitor, Touch the screen of your actual touch monitor then hit the „Enter“ key on your keyboard to exit the program.