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This piece of cloth which came along with the notebook has properties of a magnet attracting all kinds of particles. I used to keep this between the keyboard and screen, so all the particles on the cloth which were too small to be seen with the eye used to stick to the touch screen due to which it misbehaved. Last evening i cleaned laptop screen properly with a liquid lcd cleaner, powered it up, enabled the HID Compliant Touch Screen & it worked properly. I tested all apps and configurations and all were good. I powered it off and closed the laptop with this piece of cloth between the keyboard and screen. After an hour again i powered it on, and again the ghost touching issue emerged. Then checked the screen with magnifier on mobile and found lots of particles on the screen. That’s when i realized that this piece of cloth was the culprit. All’s well that end’s well. Thanks for your support & suggestions.