self moving cursor

[doncouple]

when on the internet every so often (more than likely when i find what i am looking for) the cursor on my screen shoots of on its own and proceeds to right click some times or just go to the top right corner and miminize my page or exit the pagesi have open
please can some one please help me find this beast
i have tried to restore back but it wont let me
my virus software does not find anything
and in propities it says my mouse is working ok

[Tech12]

If you are using a mouse that operates using the ball, you might need to clean the ball underneath it.

If it is dirty most of the times has those symptoms, or just get a new mouse.