I have some touchscreen overlays that don't calibrate properly with the standard 3 point alignment tool supplied with the software. Something about the firmware is different or messed up.
I don't recall where what version it came from (I THINK v4.3.0), but in any case I have a 25 point alignment tool. just drop it in the ELO program folder and run it from there instead of the "EloVa.exe"It works for sure with windows XP, not 100% sure about windows 7/8 give it a try anyways.
(rename the file from ".txt" to ".exe" to appease the file block on the forum)