Got a device in which the touch screen was unfortunately without function. Tried the problem only by various forums and help pages to resolve (drivers in different versions and different order installed, etc) but then have to resort to the hotline from Lenovo. However, I was as reassured that under Windows 8.1, the touch screen from the beginning to work or should be recognized.
Conclusion: The faulty equipment returned (exemplary Amazon: 3 days to refund) and max. a star