Been using rarely my Lenovo G560 laptop and after long time of not using it I have noticed that touchpad stops responding after short while. Incidentally while trying to find the cause, after pointing on taskbar I've noticed swift tabbing in right direction between taskbar icons appearing as some key was stuck which is the case I reckon because when problem reappears and I press on directional right key, the scrolling stops for short period but then resumes. The bad thing is that it also happens in BIOS, not to mention Windows 7 boot screen and scrolls down, which leads me to believe something is faulty in keyboard keys or keyboard itseld because no key is stuck-pressed.
See this video of scrolling in Start menu:
This laptop hasn't been used for over a year and I did not drop it. Should I take keyboard off and clean contacts? How to solve this?