I have the ideapad u430 touch and there has been no problems before, but lately I have been getting a really big problem for me, since this make the computer almost useless. 

It doesnt happen all the time, it come and goes.. 

When i scroll down, I automatically come to the top.. I cant scroll down when this happen. 

And when im writing things the computer by itself puts the marker at the beginning in the box where im writing, doesnt matter wich program I use or if its on internet. 

Even when i press enter or try to make the marker go to the place where i want it so i can write normal words it goes back again automatically.. 

I have tried to uninstall the synaptics driver and install it again from lenovo support page. 

I even tried to uninstall windows and erase everything from the computer, for a couple of hours that solved the problem. But now the problem has returned and its really annoying. 

Can someone please help me fix this or come with a solution?