>>>Anybody have any idea how to switch off the touchpad
We'd need to know the exact model to give you a definite answer but there are two general ways of doing so. (Hopefully one of them will apply in your case).
1. Some laptops simply have a button near to the touchpad (usually immediately above it) that toggles it on and off.
2. Others use an 'Fn' key combination:
Look for the Fn key on your keyboard and note its colour. Then look for symbols, in the same colour, elsewhere on your keyboard (but probably mainly on the 'F' keys across the top). You're seeking one with a picture of a trackpad (possibly with a line through it or 'No Entry sign' next to it) on it.
Examples:
http://img.aws.ehowcdn.com/640/cme/photography.prod.demandstudios.com/193605ba-e264-41bd-85e0-028d50bbd023.jpg
http://3.bp.blogspot.com/--zp2cxePOjo/UuGPsJIjrxI/AAAAAAAAIiU/SpwQvTF6EE4/s1600/20140123_153316.jpg
Pressing that key and Fn at the same time will toggle your touchpad off and on.