My laptop is Inspiron 17 7000. It is a touch screen. Recently the screen always suddenly  show 5-6 touch spots, and the mouse flashed. When it happened, I can do nothing. The horrible thing is, yesterday the mouse flashing and it open word file by itself !  

I guess it caused by virus, so I reset system yesterday. But it happened again right now. I despaired. Is it because I updated to Window !0？ 

please help!!! Thank you.