Required Software

3D Slicer

GPU Rendering is preferred in Slicer (CPU can be laggy). To enable for Alienware laptop:

https://discourse.slicer.org/t/can-i-choose-which-gpu-to-use/3149

Then enable GPU Rendering by default in Slicer: Edit -> Application Settings -> Volume Rendering

Slicer Extensions

Slicer IGT Extension
In Slicer go to View Menu -> Extension Manager. Search for and install SlicerIGT package.

Slicer OpenIGTLink Extension
If using a version of Slicer higher than 4.8.1, the SlicerOpenIGTLink extensions should also be installed. This is because the OpenIGTLinkIF module is not included by default.

PLUS

A specific, password protected, version is needed, available here. This has support for the StealthLink, BK5000 and Ultrasonix machines.