Notebook-PC:~$ sudo apt-get install touchpad-indicator 
[sudo] password for cq42: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
touchpad-indicator is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
cq42@cq42-Presario-CQ42-Notebook-PC:~$