A: 1. Open the Start menu on the desktop;

2. Click on Control Panel;

3. Choose “Hardware and Sound”;

4. Select "Tablet PC Input Panel" under the "Tablet PC Settings";

5. Click “Reset” and then click the “Calibrate” button to calibrate according to the on-screen instructions, as shown below:

6. After finish the calibration, select "Confirm and Save”, and test the touch function.