Posted 05 November 2011 - 07:50 PM
HP Tower running Vista Ultimate. Never had an issue with this PC before. A few days after 11 Windows updates, mouse cursor started jittering drunkenly. It responds to the (wired, optical) mouse, meaning the cursor will move but won't hold still and is impossible to navigate. Navigation must be done via keyboard (difficult and annoying).
Tried mouse in another PC, works fine. Even hooked up a KVM switch to another PC and everything switches fine -- except the mouse. Unplugged the mouse entirely and arrow still dances within a small area on the screen.
Did a system restore to undo the Windows updates. Restored successfully, but no change.
Tried another USB port but nothing. Uninstalled and rebooted. Allowed Windows to find and install mouse -- no good.
The fact that it's NOT the mouse (as it is rock solid in the other PC) makes me wonder what else causes a cursor to move when no pointing device is plugged in? Any thoughts?
I'm brand new here, so if I need to do anything additional, please let me know. Thank you.