After a while of use, say anytime after 40mins use the touchpad stops responding and before it does, the cursor bounces around the screen before it disappears.  Moving your finger over the touchpad does nothing - as though touchpad device is no longer in the device configuration.  Solution, use Windows button to tab to Shutdown, leave laptop along for 20mins+ then start up.  

Windows/Samsung drivers/apps all up-to-date.  

The problem started over a month ago.