Toshiba Windows 7 Home Premium 64-bit laptop.
The Synaptic touchpad that comes with the laptop has always been erratic, mouse jumps around all the time. So I disabled it (even removed the device driver from Control Panel/Mouse/Hardware) and installed a Logitech M305 wireless mouse with a nano-USB receiver. To my surprise, the mouse pointer still jumps around slightly even when I don't actually move the mouse. Just placing a finger on the touchpad usually calms it down. Moving a finger on the touchpad moves the pointer but only in the horizontal direction.
So it appears that the touchpad is still alive and contributing to the mouse pointer jumping around.
What is going on here? How can I completely disable the darn touchpad? There is a hardware on/off button at the top of the touchpad but even that doesn't do the trick. Yes, I updated the latest M305 driver from logitech.com.
Update: Uninstalling the PS/2 mouse driver in Device Manager and rebooting solves the problem but the driver comes back after a few days and so does the mouse jitter! Is this a Windows thing, we are not allowed to remove the driver?