The easy way to get a 3-button T450/T450s Synaptics touchpad working on a T440p in Windows
Important: This only applies to Synaptics touchpads, not ALPS! OctoPerf’s T440p buyer’s guide includes some hints on how to tell them apart. This is a simplified version of the instructions based on Nick Heim’s blog post which goes through the process of how the registry file below was created. So, most of the instructions for setting up the 3-button touchpad on a T440p to get proper trackpoint buttons are unnecessarily complicated. They’ll ask you to reboot into safe mode to…