Mouse moves on own to desktop

[ang13]

I have a Dell XPS laptop running Windows 7 Home Premium that is nearly 1 year old - it has not been dropped or damaged in any way with liquid/food. My mouse (normally controlled by a touch pad) continues to move on its own to the bottom right hand corner to the show desktop toggle or the time/calendar area. It does this even when I am using the mouse. It is very annoying and I don't know how to fix it. Any suggestions?
Ang

 

[mace200200]

That can mean malware, scan with anti malware bytes, and see what comes up. I'd do the full scan right away.

 

[ang13]

Thanks for the reply. I did a full virus/spyware/malware scan with all of the following and came back that the system is fine: SpyBot, Malwarebytes, Hack This Security, Norton360, and ended with a CCleaner. Any other ideas?