Hello
Maybe it’s just a driver issue… I have checked the available downloads for Tecra A10 on Toshiba page and for Windows 7 32bit there is a newer driver available, for Windows 7 64bit not (no driver). So you must use the Vista 64bit driver…
What you can do is testing the touchpad driver for Tecra A11. There is a newer version for Windows 7 64bit from Alps Electric so the correct one. Touchpad driver is not system related so I’m pretty sure it also works on your model.
Have a look on Toshiba website for Tecra A11 driver:
http://eu.computers.toshiba-europe.com > Support & Downloads > Download Drivers