Hi, I know I'm not the only one, but I finally conclude that what I assume was a system freeze, is not, is only internal KEYBOARD and MOUSE dissapearing on my Macbook Air 13 (not using external). I'm running a clean install without any particular software running. I removed everything Just Safari. It always happend while I'm typing and the only button responsive on the system is the POWER OFF, which I cannot use since any other button works. This was not happending in Mavericks, but I did a PRAM reset anyway. I find a couple of threads here with the same problem but no solution. Anyone a clue where to start before going back to Mavericks?