My touchscreen (k90) is loosing the calibration all the time. I have installed the latest drivers, but with no luck. Sometimes it can keep the calibration for som minutes, and sometimes it looses the calibration just after i have done the 4 point calibration. I have made the 25 point linearization. Please help - it is driving me crazy. Can it bee that i am running 800x600 on a 800x480 screen?? I cannot change the resolution to 800x480 because the jetway motherboard does not support that resolution.