Fixing a Non-Working Lenovo X220 Trackpoint and Touchpad (Win7)

Описание

CAUTION: For experts only. Use at your own risk. Don't dismantle your laptop unless you know what you are doing!

I recently bought a Lenvo x220 It came with Windows 10 and only the touchpad was working. I assumed this was due to it having a standard PS2 driver installed rather than the Lenovo Synaptics one

As I'm a developer I wanted Windows 7 to support some legacy software, so installed this as well as the Lenovo touchpad driver. After this, neither the trackpoint (nipple) or touchpad worked now. The touchpad could be enabled by reverting to a standard P/S2 mouse driver

Looking up the issue I found that this was a common problem and there didn't seem to be a reliable fix...