Dynabook Tecra PT439A-00N003 ALPS Pointing Device Driver 10.x0.303.104 for Windows 10 64-bit Nov 23, 2021
... from it with the help of an external wireless or wired TouchPad device. If you wish to update to this version, know that it can enhance overall performance and stability, add different fixes for various touch problems, improve existing gestures, or even include support for new ones. ...