This laptop was purchased long back. Had done a lot of work. Only one year back I had some problem with charging. It would not charge. Got it repaired at 3900 Rupees. And This year the charger(Delta Electronics) died. I replaced with new acer adaper(Rupees 1350). The laptop is still functioning and perfect for my work.
Have not faced the jumping cursor problem . It may be that when you are typing the mousepad is ON and you may be accidentally touching it.