Macbook pro OS X 10.5.8 can not control mouse
I'm having problems with my mouse (usb lazer mouse) and trackpad. I can't control the mouse, it opens windows, files and closes and basically does it's own thing. Jumps around as well. When I disconnect it the trackpad is not responsive. Can I have a virus or what could cause this?
MacBook Pro, Mac OS X (10.5.8)