Turn the laptop keyboard off in Control Panel, YES!
Or in Registry, YES!
Video on it for OP to watch works well almost always!
Acer Aspire 7739Z-4416 Laptop Keyboard Replacement
Acer Aspire Laptop Keyboard Installation Replacement Guide ...

Have a computer or save the video to usb or dvd, etc so you can view it on say your TV or another computer to pause, rewind, view, etc.

surface of laptop where keyboard is located is usually held in place with clips as part of the face-piece. the screws on the laptop are mm and the locations are marked where the screws go by size usually lejngth, etc. look at and take a picture of the laptop as you go and you are an IT with a photographic memory!

btw: need a magnetized screwdriver or bit?
How to : Magnetize a Screwdriver

Bill