Originally Posted by
willyroo
Try a full uninstall - install of the wireless "human interface devices"

software. I had the same problem and that sorted it.
Worth checking the batteries and their connection as well.
Thanks for chiming in.
When I went to the Control Panel and tried to find this "human interface device" software, could find anything associates with that. What is the exact name should I be looking for? Once I uninstall it, do I need the OS DVD to install it back? Or is it done automatically by the OS during boot-up?
Battery chamber and spring all seem good.