1. Move your mouse cursor to the bottom left of the screen. Right mouse click the Windows 

icon, then left mouse click  “Run”.

2. Key in or copy:  shell:::{80F3F1D5-FECA-45F3-BC32-752C152E456E}  and select "OK".

3. The Tablet PC Settings will show up as below. You can select “TD2220” under 

Display options followed by clicking on “Calibrate”. 


After the calibration process is done, the touch accuracy should improve.