My first feeling is this may be related to your connection, but there may also be a problem with the trackpad itself (damaged?). Either way, let's eliminate the possibility of software problems. Could you check if the trackpad is listed in your device management? In the Device Management interface of Windows, you should find "Synaptics Pointing Device" under the Mice and Other Pointing Devices category. If there is one, right click on it and open the Property card to update the driver and restart your computer. If all these steps cannot fix your problem, there most likely be a hardware issue to my knowledge...
X31 (since 2003), X61T (2007), X200T (2009), ThinkPad Tablet 2 (2013), P50 (2016).
Considering more Thinkpads. Retiring my X200T. PM me if anyone wants to home it.
OS: Ubuntu and Windows 10.