To Calibrate touch screen on Windows:
Press Windows Start button and search for "Calibrate the screen" and you should see an option like this :
After clicking that option To setup the touch screen for the first time with customer display click Setup, then follow the prompts on the screen (Press Enter to move to the next screen if it doesn't auto move to the correct touch display)
To Calibrate the screen select the correct screen and Press "Calibrate"
Advance:
In case if "Calibrate the Screen" doesn't show any options here is a workaround :
Go to the Desktop.
Right click on the Desktop and select New/Shortcut.
In the Type the location of the item window, Copy/Paste the following.
%windir%\explorer.exe shell:::{80F3F1D5-FECA-45F3-BC32-752C152E456E}
Click the Next button and type the name Tablet PC Settings.
Click the Finish button.
Double Click the new shortcut and it should open the Table PC Settings window.