Tutorial on how to enable and disable the touch screen on windows surface as follows:
Touch Tray Toggle 64 Bit http://www.mediafire.com/download/wwjyvcpth07l5yc/Tray_Touch_Toggle_(64_bit).zip
Touch Tray Toggle 32 Bit http://www.mediafire.com/download/o72c4w9hh4hbdwd/Tray_Touch_Toggle_(32_bit).zip
When you launch the program it will guide you to identifying the touchscreen component, you input this information, and it will create a shortcut that sits in your system tray and allow you to toggle the touch screen on & off.
You can also set it WINDOWS to disable the touch screen when the pen is near in the OS. Under pen settings.