Just a comment on the touchscreen sensitivity that I've discovered yesterday. I had the sensitivity setup to "high performance" & still had the touch working sporadically at times; & not registered sometimes. Even after the latest system update to improve the touch sensitivity. Decided to use a "light touch" instead of a heavy handed touch & things worked very smoothly & easily; IOW, my "touch" was too hard! Have now changed the sensitivity to "middle" to see it that works with my fat fingertips & probably check how I should "touch" the screen. Some problems with the touchscreen could be that the touch was using too much pressure in pressing the screen! & not that it wasn't working correctly.