To disable tablet stylus "flicks" do the following:
- Under Windows 7 Control Panel, select "Tablet PC Setting" and find "Pen and Touch". Or better yet, search "Pen and Touch" in Windows search box (just pressure the Windows key to bring up the search box).
- Under "Flicks" tab, unchecked the "Use flicks to perform common actions quickly and easily"
- In addition, you can also disable "Press and hold" and "Use Your finger as an input device" (particularly when I don't have a touch screen on my desktop) to make your stylus even more responsive when drawing.