Attempted to upgrade Ezbook X3 to Win10 2004: failed. (X3 N3350 not X3 Pro)
Lost mouse cursor and no Touchpad input.
External USB mouse still worked.
Tried above fixes via BIOS: failed.
Disconnected power and battery (opened bottom) for 10 minutes.
Reconnected Battery (and disconnected external USB mouse), restarted and cursor and Touchpad worked again.
Note: to dis and reconnect: remove battery from mount, or it is easy to bend connector pins because battery impedes connector.
