I did the manipulations here:
Try to turn off the service 'TabletPC Input Service'.
And for the touch drop effect you can change or add the following registry keys:
removed "tablet pc components" from "windows functionalities"
But there remain a little problem. If I do two clicks too fast near each other while drawing, it does a line between. It doesn't do that with the mouse, so it's only with the stylet.
Does someone had the same problem?