Not is what's wrong with my keyboard, have a couple of weeks that using styles is locked, no button is unresponsive and a note gets caught and I have to restart it again. Does not always occur, yesterday to install the new OS 5.3c and still the same, I have put the update ajamsonic.Happened to me twice already in action and 5 minutes are it takes to restart. Someone had a same problem, I am desperate and Aj does not answer my messages.