What should I do if the touch screen is not responding properly?

First, turn off the computer and use a dry, soft, lint-free cloth to remove fingerprints or dust from the touch screen without applying solvents. Restart the computer and check if it works normally. If still unresponsive, run Windows Update by typing 'Windows Update' in the search box and following the on-screen instructions. If the problem persists, contact Lenovo Customer Support as the touch screen may be damaged.