You can usually disable the touchpad on a laptop by using the Fn key in conjunction with another F key. However, most PB Easynotes have a touchpad disable button - which is usually somewhere near the touchpad. You haven't mentioned the model but should appear in the user guide.
I also looked in Device Manager>Mive & Other Pointing Devices, but it only lists the two devices I mentioned above. In Properties, there was no mention of a touchpad.
That made me start to wonder whether the Synaptics touchpad drivers were properly installed. The touchpad was working OK, but I suspected that it might be running on a Windows generic driver.
So I went to the Packard Bell website and found the driver download. It was specified for Vista, not W7, but I took a chance and downloaded it. After installation, the computer crashed on restart. However, it recovered itself. Thereafter, the pointing devices properties included a tab for the touchpad. That tab includes a "disable" button.
So job done!
Thanks very much for guiding me to the solution. I'm very grateful.
This thread is now locked and can not be replied to.