1. My experience with laptop programs locking up when using plasma is due to RF feeding back through the generator connection. The measures I used to reduce RF interference in the posts below have significantly reduced program lockup. In recent times I only had to reboot my laptop when I lost a USB generator connection.
2. Try getting the cables with the ferrite cores. Here there are on the Spooky2 Mall:
Also for the BNC connector:
3. The program crashing (not responding) happened to me as well.. I had multiple generators as well as my plasma machine tied into one power strip. When I relocated the plasma machine to a different outlet in the same bedroom, my problems disappeared. I'd suggest giving that a try.
4. Putting a ferrite/iron ring around the power cord from Central/Plasma would also be a good idea.
If you want more details, please check the link: