Macbook mouse moving and opening folders, files on its own
We have the last generation 13" Macbook and recently while working, the mouse pointer will suddenly start moving around the desktop and various files and folders will suddenly start opening up on their own. If we try to move the mouse ourselves it will start jerking around the screen but still keep opening files and folder.
It acts as if someone has taken control of the mac remotely and is controlling the mouse to move it around and open everything...
We have Sophos and have verified it has the latest virus deifinitions and have done several complete scans and it finds nothing. We also installed Macscan and it finds nothing. Our home router also has two firewalls that are active. We also checked for any software updates as well.
Not sure what is causing this or how to correct this problem.
MacBook, iOS 6.1.4