In Windows 7 I downloaded the latest driver from Synaptics and it gave me the option to disable the touchpad. However nothing I do has allowed me to do the same thing in Windows 8. I never get the touchpad icon in the system tray. When I go to the Mouse device in device manager it shows the touchpad as another device but the "disable" button is grayed out.
I am using an Acer Aspire notebook.