My above laptop has the basic touchpad and beneath it a left and right button located beneath the touchpad to perform selection and execution functions. It has a third button in the middle which is a 'four way scroll button,' (allows scroll up & down and left and right on a page). Initially it worked ok but has suddenly stopped working. The cursor works just fine but the fourway button is non funtional I checked the manual and Google which suggested using FN & F7 to lock and unlock the cursor, but this was unsuccssful. I contacted Acer direct who suggested I send it back to them for investigation. Before returning the machine and perhaps loosing it in their 'back-hole repair department',I thought I would check back to see if any other member hashad the same problem with this model.