This partially worked for me and totally pointed me in the right direction. Now the laptop is FIXED!!! :D It was an Acer Aspire E5 511 Trackpad not showing up in device manager. Installed the synaptic and Elan drivers but no luck. Then tried to install the Chip set drivers still no good, it kept saying error with copying file on a DLL. What did it for me was installing: Serial IO Driver And then everything else after. Now finally I have fixed my brothers laptop. I am thinking that the serial IO is that part of the motherboard that connects the computer to its peripherals including the Trackpad. Hope this helps you as the main answer indeed helped me a bit. Thanks.