Keyboard automatically types spaces

Hello,


my windows 8.1 laptop automatically fills endless dots in windows password field.
it also auto scrolls at bottom of screen continously in chrome web browser. it also automatically
types continous spaces when typing anything.also touchpad does not respond.somedays everything runs ok and somedays all of above problems return.
i tried avast full system scan,malwarebytes,spybot but still problem persists.
here is link to ZHPDiag log file:
http://speedy.sh/Vh6Sh/ZHPDiag.txt